Browsing by Author "Gleyzer, S.V."

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    Angular analysis of the decay B⁺ → K*(892)⁺μ⁺ μ⁻ in proton-proton collisions at √s = 8 TeV
    (2021) CMS Collaboration; Buccilli, A.; Charaf, O.; Cooper, S.I.; Di Croce, D.; Gleyzer, S.V.; Henderson, C.; Perez, C.U.; Rumerio, P.; West, C.; University of Alabama Tuscaloosa
    Angular distributions of the decay B\(^{+}\) → K*(892)\(^{+}\) μ\(^{+}\) μ\(^{−}\) are studied using events collected with the CMS detector in \(\sqrt{s}\)=8TeV proton-proton collisions at the LHC, corresponding to an integrated luminosity of 20.0 fb⁻¹. The forward-backward asymmetry of the muons and the longitudinal polarization of the K*(892)\(^{+}\) meson are determined as a function of the square of the dimuon invariant mass. These are the first results from this exclusive decay mode and are in agreement with a standard model prediction.
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    Combination of the W boson polarization measurements in top quark decays using ATLAS and CMS data at √s = 8 TeV
    (2020) CMS Collaboration; Buccilli, A.; Cooper, S.I.; Gleyzer, S.V.; Henderson, C.; Rumerio, P.; West, C.; University of Alabama Tuscaloosa
    The combination of measurements of the W boson polarization in top quark decays performed by the ATLAS and CMS collaborations is presented. The measurements are based on proton-proton collision data produced at the LHC at a centre-of-mass energy of 8 TeV, and corresponding to an integrated luminosity of about 20 fb⁻¹ for each experiment. The measurements used events containing one lepton and having different jet multiplicities in the final state. The results are quoted as fractions of W bosons with longitudinal (\(F_0\)), left-handed (\(F_L\)), or right-handed (\(F_R\)) polarizations. The resulting combined measurements of the polarization fractions are \(F_0\) = 0.693 ± 0.014 and \(F_L\) = 0.315 ± 0.011. The fraction \(F_R\) is calculated from the unitarity constraint to be \(F_R\) = −0.008 ± 0.007. These results are in agreement with the standard model predictions at next-to-next-to-leading order in perturbative quantum chromodynamics and represent an improvement in precision of 25 (29)% for \(F_0\) (\(F_L\)) with respect to the most precise single measurement. A limit on anomalous right-handed vector (\(V_R\)), and left- and right-handed tensor (\(g_L\), \(g_R\)) tWb couplings is set while fixing all others to their standard model values. The allowed regions are [−0.11, 0.16] for \(V_R\), [−0.08, 0.05] for \(g_L\), and [−0.04, 0.02] for \(g_R\), at 95% confidence level. Limits on the corresponding Wilson coefficients are also derived.
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    Development and validation of HERWIG 7 tunes from CMS underlying-event measurements
    (Springer, 2021) CMS Collaboration; Buccilli, A.; Charaf, O.; Cooper, S.I.; Gleyzer, S.V.; Henderson, C.; Rumerio, P.; West, C.; Yerevan Physics Institute; Belarusian State University; University of Antwerp; Vrije Universiteit Brussel; Universite Libre de Bruxelles; Ghent University; Universite Catholique Louvain; Centro Brasileiro de Pesquisas Fisicas; Universidade do Estado do Rio de Janeiro; Universidade Estadual Paulista; Universidade Federal do ABC (UFABC); Bulgarian Academy of Sciences; University of Sofia; Beihang University; Tsinghua University; Chinese Academy of Sciences; Institute of High Energy Physics, CAS; Peking University; Sun Yat Sen University; Fudan University; Zhejiang University; Universidad de los Andes (Colombia); Universidad de Antioquia; University of Split; Rudjer Boskovic Institute; University of Cyprus; Charles University Prague; Escuela Politecnica Nacional Ecuador; Egyptian Academy of Scientific Research & Technology (ASRT); Egyptian Knowledge Bank (EKB); Egyptian Network of High Energy Physics (ENHEP); Fayoum University; National Institute of Chemical Physics & Biophysics (NICPB); University of Helsinki; Helsinki Institute of Physics; Lappeenranta University of Technology; CEA; UDICE-French Research Universities; Universite Paris Saclay; Centre National de la Recherche Scientifique (CNRS); CNRS - National Institute of Nuclear and Particle Physics (IN2P3); Institut Polytechnique de Paris; Universites de Strasbourg Etablissements Associes; Universite de Strasbourg; Universite Claude Bernard Lyon 1; Georgian Technical University; RWTH Aachen University; Helmholtz Association; Deutsches Elektronen-Synchrotron (DESY); University of Hamburg; National Centre of Scientific Research "Demokritos"; National & Kapodistrian University of Athens; National Technical University of Athens; University of Ioannina; Eotvos Lorand University; Eotvos Lorand Research Network; Hungarian Academy of Sciences; Hungarian Wigner Research Centre for Physics; Hungarian Institute for Nuclear Research; University of Debrecen; Eszterhazy Karoly Catholic University; Indian Institute of Science (IISC) - Bangalore; Homi Bhabha National Institute; National Institute of Science Education & Research (NISER); Panjab University; University of Delhi; Saha Institute of Nuclear Physics; Indian Institute of Technology System (IIT System); Indian Institute of Technology (IIT) - Madras; Bhabha Atomic Research Center (BARC); Tata Institute of Fundamental Research (TIFR); Indian Institute of Science Education & Research (IISER) Pune; Isfahan University of Technology; University College Dublin; Istituto Nazionale di Fisica Nucleare (INFN); Politecnico di Bari; Universita degli Studi di Bari Aldo Moro; University of Bologna; University of Catania; University of Florence; University of Genoa; University of Milano-Bicocca; University of Naples Federico II; University of Basilicata; Guglielmo Marconi University; University of Padua; University of Trento; University of Pavia; University of Perugia; University of Pisa; Scuola Normale Superiore di Pisa; Sapienza University Rome; University of Turin; University of Eastern Piedmont Amedeo Avogadro; University of Trieste; Kyungpook National University; Chonnam National University; Hanyang University; Korea University; Kyung Hee University; Sejong University; Seoul National University (SNU); University of Seoul; Yonsei University; Sungkyunkwan University (SKKU); American University of Middle East; Riga Technical University; Vilnius University; Universiti Malaya; Universidad de Sonora; CINVESTAV - Centro de Investigacion y de Estudios Avanzados del Instituto Politecnico Nacional; Universidad Iberoamericana Ciudad de Mexico; Benemerita Universidad Autonoma de Puebla; Universidad Autonoma de San Luis Potosi; University of Montenegro; University of Auckland; University of Canterbury; National Centre for Physics - Pakistan; Quaid I Azam University; AGH University of Science & Technology; National Centre for Nuclear Research; University of Warsaw; Laboratorio de Instrumentacao e Fisica Experimental de Particulas; Joint Institute for Nuclear Research - Russia; National Research Centre - Kurchatov Institute; Petersburg Nuclear Physics Institute; Alikhanov Institute for Theoretical & Experimental Physics; Moscow Institute of Physics & Technology; National Research Nuclear University MEPhI (Moscow Engineering Physics Institute); Russian Academy of Sciences; Russian Academy of Science Lebedev Physical Institute; Lomonosov Moscow State University; Institute of High Energy Physics - IHEP; Tomsk Polytechnic University; Tomsk State University; University of Belgrade; Centro de Investigaciones Energeticas, Medioambientales Tecnologicas; Autonomous University of Madrid; University of Oviedo; Consejo Superior de Investigaciones Cientificas (CSIC); Universidad de Cantabria; CSIC - Instituto de Fisica de Cantabria (IFCA); University of Colombo; University Ruhuna; European Organization for Nuclear Research (CERN); Swiss Federal Institutes of Technology Domain; Paul Scherrer Institute; ETH Zurich; University of Zurich; National Central University; National Taiwan University; Chulalongkorn University; Cukurova University; Middle East Technical University; Bogazici University; Istanbul Technical University; Istanbul University; National Academy of Sciences Ukraine; Institute for Scintillation Materials of the National Academy of Sciences of Ukraine; Kharkov Institute of Physics & Technology; University of Bristol; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC); STFC Rutherford Appleton Laboratory; Imperial College London; Brunel University; Baylor University; Catholic University of America; University of Alabama Tuscaloosa; Boston University; Brown University; University of California System; University of California Davis; University of California Los Angeles; University of California Riverside; University of California San Diego; University of California Santa Barbara; California Institute of Technology; Carnegie Mellon University; University of Colorado System; University of Colorado Boulder; Cornell University; United States Department of Energy (DOE); University of Chicago; Fermi National Accelerator Laboratory; State University System of Florida; University of Florida; Florida State University; Florida Institute of Technology; University of Illinois System; University of Illinois Chicago; University of Iowa; Johns Hopkins University; University of Kansas; Kansas State University; Lawrence Livermore National Laboratory; University System of Maryland; University of Maryland College Park; Massachusetts Institute of Technology (MIT); University of Minnesota System; University of Minnesota Twin Cities; University of Mississippi; University of Nebraska System; University of Nebraska Lincoln; State University of New York (SUNY) System; State University of New York (SUNY) Buffalo; Northeastern University; Northwestern University; University of Notre Dame; University System of Ohio; Ohio State University; Princeton University; University of Puerto Rico; University of Puerto Rico Mayaguez; Purdue University System; Purdue University; Purdue University West Lafayette Campus; Rice University; University of Rochester; Rutgers State University New Brunswick; University of Tennessee System; University of Tennessee Knoxville; Texas A&M University System; Texas A&M University College Station; Texas Tech University System; Texas Tech University; Vanderbilt University; University of Virginia; Wayne State University; University of Wisconsin System; University of Wisconsin Madison; Technische Universitat Wien; Arab Academy for Science, Technology & Maritime Transport; Universidade Estadual de Campinas; Universidade Federal do Rio Grande do Sul; Universidade Federal de Mato Grosso do Sul; Universidade Federal de Pelotas; University of Chinese Academy of Sciences, CAS; Cairo University; Suez University; British University in Egypt; Zewail City of Science & Technology; Universite de Haute-Alsace (UHA); Ivane Javakhishvili Tbilisi State University; Erzincan Binali Yildirim University; Assiut University; Indian Institute of Technology (IIT) - Bhubaneswar; Institute of Physics Bhubaneswar (IOPB); Shoolini University; University of Hyderabad; Visva Bharati University; Indian Institute of Technology (IIT) - Bombay; University of Science & Technology of Mazandaran; Italian National Agency New Technical Energy & Sustainable Economics Development; Warsaw University of Technology; Institute for Nuclear Research of the Russian Academy of Sciences; Academy of Sciences of Uzbekistan; Peter the Great St. Petersburg Polytechnic University; Budker Institute of Nuclear Physics; University of Siena; Eastern University, Sri Lanka; Sirnak University; Near East University; Beykent University; Istanbul Aydin University; Mersin University; Piri Reis University; Adiyaman University; Ozyegin University; Izmir Institute of Technology; Necmettin Erbakan University; Bozok University; Marmara University; Kafkas University; Istanbul Bilgi University; Hacettepe University; University of Southampton; Durham University; Monash University; Karamanoglu Mehmetbey University; Ain Shams University; Bingol University; Sinop University; Mimar Sinan Guzel Sanatlar University; Nanjing Normal University; Qatar Foundation (QF); Texas A&M University Qatar
    This paper presents new sets of parameters (“tunes”) for the underlying-event model of the \(HERWIG\phantom{\rule{0.166667em}{0ex}}7\) event generator. These parameters control the description of multiple-parton interactions (MPI) and colour reconnection in \(HERWIG\phantom{\rule{0.166667em}{0ex}}7\), and are obtained from a fit to minimum-bias data collected by the CMS experiment at \(\sqrt{s}=0.9\), 7, and \(13\phantom{\rule{0.166667em}{0ex}}\text{Te}\phantom{\rule{0.333333em}{0ex}}\). The tunes are based on the NNPDF 3.1 next-to-next-to-leading-order parton distribution function (PDF) set for the parton shower, and either a leading-order or next-to-next-to-leading-order PDF set for the simulation of MPI and the beam remnants. Predictions utilizing the tunes are produced for event shape observables in electron-positron collisions, and for minimum-bias, inclusive jet, top quark pair, and Z and W boson events in proton-proton collisions, and are compared with data. Each of the new tunes describes the data at a reasonable level, and the tunes using a leading-order PDF for the simulation of MPI provide the best description of the data.
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    Evidence for electroweak production of four charged leptons and two jets in proton-proton collisions at root s=13 TeV
    (Elsevier, 2020) CMS Collaboration; Buccilli, A.; Charaf, O.; Cooper, S.I.; Gleyzer, S.V.; Henderson, C.; Rumerio, P.; West, C.; Yerevan Physics Institute; Belarusian State University; University of Antwerp; Vrije Universiteit Brussel; Universite Libre de Bruxelles; Ghent University; Universite Catholique Louvain; Centro Brasileiro de Pesquisas Fisicas; Universidade do Estado do Rio de Janeiro; Universidade Estadual Paulista; Universidade Federal do ABC (UFABC); Bulgarian Academy of Sciences; University of Sofia; Beihang University; Chinese Academy of Sciences; Institute of High Energy Physics, CAS; Peking University; Tsinghua University; Universidad de los Andes (Colombia); Universidad de Antioquia; University of Split; Rudjer Boskovic Institute; University of Cyprus; Charles University Prague; Escuela Politecnica Nacional Ecuador; Egyptian Academy of Scientific Research & Technology (ASRT); Egyptian Knowledge Bank (EKB); Egyptian Network of High Energy Physics (ENHEP); National Institute of Chemical Physics & Biophysics (NICPB); University of Helsinki; Helsinki Institute of Physics; Lappeenranta University of Technology; CEA; UDICE-French Research Universities; Universite Paris Saclay; Centre National de la Recherche Scientifique (CNRS); CNRS - National Institute of Nuclear and Particle Physics (IN2P3); Institut Polytechnique de Paris; Universites de Strasbourg Etablissements Associes; Universite de Strasbourg; Universite Claude Bernard Lyon 1; Georgian Technical University; Ivane Javakhishvili Tbilisi State University; RWTH Aachen University; University of Hamburg; Helmholtz Association; Karlsruhe Institute of Technology; National Centre of Scientific Research "Demokritos"; National & Kapodistrian University of Athens; National Technical University of Athens; University of Ioannina; Eotvos Lorand University; Eotvos Lorand Research Network; Hungarian Academy of Sciences; Hungarian Wigner Research Centre for Physics; Hungarian Institute for Nuclear Research; University of Debrecen; Indian Institute of Science (IISC) - Bangalore; Homi Bhabha National Institute; National Institute of Science Education & Research (NISER); Panjab University; University of Delhi; Saha Institute of Nuclear Physics; Indian Institute of Technology System (IIT System); Indian Institute of Technology (IIT) - Madras; Bhabha Atomic Research Center (BARC); Tata Institute of Fundamental Research (TIFR); Indian Institute of Science Education & Research (IISER) Pune; University College Dublin; Istituto Nazionale di Fisica Nucleare (INFN); Universita degli Studi di Bari Aldo Moro; Politecnico di Bari; University of Bologna; University of Catania; University of Florence; University of Genoa; University of Milano-Bicocca; University of Naples Federico II; University of Basilicata; Guglielmo Marconi University; University of Padua; University of Trento; University of Pavia; University of Perugia; University of Pisa; Scuola Normale Superiore di Pisa; Sapienza University Rome; University of Turin; University of Eastern Piedmont Amedeo Avogadro; University of Trieste; Kyungpook National University; Chonnam National University; Hanyang University; Korea University; Sejong University; Seoul National University (SNU); University of Seoul; Sungkyunkwan University (SKKU); Vilnius University; Universiti Malaya; Universidad de Sonora; CINVESTAV - Centro de Investigacion y de Estudios Avanzados del Instituto Politecnico Nacional; Universidad Iberoamericana Ciudad de Mexico; Benemerita Universidad Autonoma de Puebla; Universidad Autonoma de San Luis Potosi; University of Auckland; University of Canterbury; National Centre for Physics - Pakistan; Quaid I Azam University; National Centre for Nuclear Research; University of Warsaw; Laboratorio de Instrumentacao e Fisica Experimental de Particulas; Joint Institute for Nuclear Research - Russia; National Research Centre - Kurchatov Institute; Petersburg Nuclear Physics Institute; Russian Academy of Sciences; Institute for Nuclear Research of the Russian Academy of Sciences; Alikhanov Institute for Theoretical & Experimental Physics; Moscow Institute of Physics & Technology; National Research Nuclear University MEPhI (Moscow Engineering Physics Institute); Russian Academy of Science Lebedev Physical Institute; Lomonosov Moscow State University; Novosibirsk State University; Institute of High Energy Physics - IHEP; Tomsk Polytechnic University; University of Belgrade; Centro de Investigaciones Energeticas, Medioambientales Tecnologicas; Autonomous University of Madrid; University of Oviedo; Consejo Superior de Investigaciones Cientificas (CSIC); Universidad de Cantabria; CSIC - Instituto de Fisica de Cantabria (IFCA); European Organization for Nuclear Research (CERN); Swiss Federal Institutes of Technology Domain; Paul Scherrer Institute; University of Zurich; National Central University; National Taiwan University; Chulalongkorn University; Cukurova University; Middle East Technical University; Bogazici University; Istanbul Technical University; National Academy of Sciences Ukraine; Institute for Scintillation Materials of the National Academy of Sciences of Ukraine; Kharkov Institute of Physics & Technology; University of Bristol; Imperial College London; Brunel University; Baylor University; Catholic University of America; University of Alabama Tuscaloosa; Boston University; Brown University; University of California System; University of California Davis; University of California Los Angeles; University of California Riverside; University of California San Diego; University of California Santa Barbara; California Institute of Technology; Carnegie Mellon University; University of Colorado System; University of Colorado Boulder; Cornell University; United States Department of Energy (DOE); University of Chicago; Fermi National Accelerator Laboratory; State University System of Florida; University of Florida; Florida International University; Florida State University; Florida Institute of Technology; University of Illinois System; University of Illinois Chicago; University of Iowa; Johns Hopkins University; University of Kansas; Kansas State University; Lawrence Livermore National Laboratory; University System of Maryland; University of Maryland College Park; Massachusetts Institute of Technology (MIT); University of Minnesota System; University of Minnesota Twin Cities; University of Mississippi; University of Nebraska System; University of Nebraska Lincoln; State University of New York (SUNY) System; State University of New York (SUNY) Buffalo; Northeastern University; Northwestern University; University of Notre Dame; University System of Ohio; Ohio State University; Princeton University; University of Puerto Rico; University of Puerto Rico Mayaguez; Purdue University System; Purdue University; Purdue University West Lafayette Campus; Rice University; University of Rochester; Rutgers State University New Brunswick; University of Tennessee System; University of Tennessee Knoxville; Texas A&M University System; Texas A&M University College Station; Texas Tech University System; Texas Tech University; Vanderbilt University; University of Virginia; Wayne State University; University of Wisconsin System; University of Wisconsin Madison; Technische Universitat Wien; Universidade Estadual de Campinas; Universidade Federal do Rio Grande do Sul; University of Chinese Academy of Sciences, CAS; British University in Egypt; Suez University; Fayoum University; King Abdulaziz University; Universite de Haute-Alsace (UHA); Brandenburg University of Technology Cottbus; Indian Institute of Technology (IIT) - Bhubaneswar; Institute of Physics Bhubaneswar (IOPB); Shoolini University; Visva Bharati University; Isfahan University of Technology; Islamic Azad University; University of Siena; Kyung Hee University; International Islamic University Malaysia; Agensi Nuklear Malaysia; Warsaw University of Technology; Peter the Great St. Petersburg Polytechnic University; Budker Institute of Nuclear Physics; Riga Technical University; Adiyaman University; Istanbul Aydin University; Mersin University; Piri Reis University; Gaziosmanpasa University; Ozyegin University; Izmir Institute of Technology; Marmara University; Kafkas University; Istanbul University; Istanbul Bilgi University; Hacettepe University; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC); STFC Rutherford Appleton Laboratory; University of Southampton; Monash University; Karamanoglu Mehmetbey University; Utah System of Higher Education; Utah Valley University; Beykent University; Bingol University; Sinop University; Mimar Sinan Guzel Sanatlar University; Qatar Foundation (QF); Texas A&M University Qatar; University of Hyderabad; University of Science & Technology of Mazandaran
    Evidence is presented for the electroweak (EW) production of two jets (jj) in association with two Z bosons and constraints on anomalous quartic gauge couplings are set. The analysis is based on a data sample of proton-proton collisions at \(\sqrt{s}=13\phantom{\rule{0.2em}{0ex}}\text{TeV}\) collected with the CMS detector in 2016–2018, and corresponding to an integrated luminosity of 137\(\phantom{\rule{0.2em}{0ex}}{\text{fb}}^{-1}\). The search is performed in the fully leptonic final state \(ZZ\to \ell \ell {\ell }^{\prime }{\ell }^{\prime }\), where \(\ell,{\ell }^{\prime }=e,\mu \). The EW production of two jets in association with two Z bosons is measured with an observed (expected) significance of 4.0 (3.5) standard deviations. The cross sections for the EW production are measured in three fiducial volumes and the result is \({\sigma }_{\mathrm{EW}}\left(pp\to ZZ\mathrm{jj}\to \ell \ell {\ell }^{\prime }{\ell }^{\prime }\mathrm{jj}\right)={0.33}_{-0.10}^{+0.11}\phantom{\rule{0.2em}{0ex}}{\text{(stat)}}_{-0.03}^{+0.04}\phantom{\rule{0.2em}{0ex}}\text{(syst)}\phantom{\rule{0.20em}{0ex}}\text{fb}\) in the most inclusive volume, in agreement with the standard model prediction of \(0.275±0.021\phantom{\rule{0.20em}{0ex}}\text{fb}\). Measurements of total cross sections for jj production in association with two Z bosons are also reported. Limits on anomalous quartic gauge couplings are derived in terms of the effective field theory operators T0, T1, T2, T8, and T9.
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    Evidence for Higgs boson decay to a pair of muons
    (2021) CMS Collaboration; Buccilli, A.; Charaf, O.; Cooper, S.I.; Gleyzer, S.V.; Henderson, C.; Perez, C.U.; Rumerio, P.; West, C.; University of Alabama Tuscaloosa
    Evidence for Higgs boson decay to a pair of muons is presented. This result combines searches in four exclusive categories targeting the production of the Higgs boson via gluon fusion, via vector boson fusion, in association with a vector boson, and in association with a top quark-antiquark pair. The analysis is performed using proton-proton collision data at \(\sqrt{s}\) = 13 TeV, corresponding to an integrated luminosity of 137 fb⁻¹, recorded by the CMS experiment at the CERN LHC. An excess of events over the back- ground expectation is observed in data with a significance of 3.0 standard deviations, where the expectation for the standard model (SM) Higgs boson with mass of 125.38 GeV is 2.5. The combination of this result with that from data recorded at \(\sqrt{s}\) = 7 and 8 TeV, corresponding to integrated luminosities of 5.1 and 19.7 fb⁻¹, respectively, increases both the expected and observed significances by 1%. The measured signal strength, relative to the SM prediction, is \({1.19}_{-0.39}^{+0.40}{\left(\text{stat}\right)}_{-0.14}^{+0.15}\left(\text{syst}\right)\). This result constitutes the first evidence for the decay of the Higgs boson to second generation fermions and is the most precise measurement of the Higgs boson coupling to muons reported to date.
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    Evidence for Top Quark Production in Nucleus-Nucleus Collisions
    (American Physical Society, 2020) CMS Collaboration; Buccilli, A.; Charaf, O.; Cooper, S.I.; Gleyzer, S.V.; Henderson, C.; Rumerio, P.; West, C.; Yerevan Physics Institute; Belarusian State University; University of Antwerp; Vrije Universiteit Brussel; Universite Libre de Bruxelles; Ghent University; Universite Catholique Louvain; Centro Brasileiro de Pesquisas Fisicas; Universidade do Estado do Rio de Janeiro; Universidade Estadual Paulista; Universidade Federal do ABC (UFABC); Bulgarian Academy of Sciences; University of Sofia; Beihang University; Tsinghua University; Chinese Academy of Sciences; Institute of High Energy Physics, CAS; Peking University; Sun Yat Sen University; Zhejiang University; Universidad de los Andes (Colombia); Universidad de Antioquia; University of Split; Rudjer Boskovic Institute; University of Cyprus; Charles University Prague; Escuela Politecnica Nacional Ecuador; Egyptian Academy of Scientific Research & Technology (ASRT); Egyptian Knowledge Bank (EKB); Egyptian Network of High Energy Physics (ENHEP); Fayoum University; National Institute of Chemical Physics & Biophysics (NICPB); University of Helsinki; Helsinki Institute of Physics; Lappeenranta University of Technology; CEA; UDICE-French Research Universities; Universite Paris Saclay; Centre National de la Recherche Scientifique (CNRS); CNRS - National Institute of Nuclear and Particle Physics (IN2P3); Universites de Strasbourg Etablissements Associes; Universite de Strasbourg; Universite Claude Bernard Lyon 1; Georgian Technical University; Ivane Javakhishvili Tbilisi State University; RWTH Aachen University; Helmholtz Association; Deutsches Elektronen-Synchrotron (DESY); University of Hamburg; Karlsruhe Institute of Technology; National Centre of Scientific Research "Demokritos"; National & Kapodistrian University of Athens; National Technical University of Athens; University of Ioannina; Eotvos Lorand University; Eotvos Lorand Research Network; Hungarian Academy of Sciences; Hungarian Wigner Research Centre for Physics; Hungarian Institute for Nuclear Research; University of Debrecen; Eszterhazy Karoly Catholic University; Indian Institute of Science (IISC) - Bangalore; Homi Bhabha National Institute; National Institute of Science Education & Research (NISER); Panjab University; University of Delhi; Saha Institute of Nuclear Physics; Indian Institute of Technology System (IIT System); Indian Institute of Technology (IIT) - Madras; Bhabha Atomic Research Center (BARC); Tata Institute of Fundamental Research (TIFR); Indian Institute of Science Education & Research (IISER) Pune; Isfahan University of Technology; University College Dublin; Istituto Nazionale di Fisica Nucleare (INFN); Universita degli Studi di Bari Aldo Moro; Politecnico di Bari; University of Bologna; University of Catania; University of Florence; University of Genoa; University of Milano-Bicocca; University of Naples Federico II; University of Basilicata; Guglielmo Marconi University; University of Padua; University of Trento; University of Pavia; University of Perugia; University of Pisa; Scuola Normale Superiore di Pisa; Sapienza University Rome; University of Turin; University of Eastern Piedmont Amedeo Avogadro; University of Trieste; Kyungpook National University; Chonnam National University; Hanyang University; Korea University; Kyung Hee University; Sejong University; Seoul National University (SNU); University of Seoul; Yonsei University; Sungkyunkwan University (SKKU); Riga Technical University; Vilnius University; Universiti Malaya; Universidad de Sonora; CINVESTAV - Centro de Investigacion y de Estudios Avanzados del Instituto Politecnico Nacional; Instituto Politecnico Nacional - Mexico; Universidad Iberoamericana Ciudad de Mexico; Benemerita Universidad Autonoma de Puebla; Universidad Autonoma de San Luis Potosi; University of Montenegro; University of Auckland; University of Canterbury; National Centre for Physics - Pakistan; Quaid I Azam University; AGH University of Science & Technology; National Centre for Nuclear Research; University of Warsaw; Laboratorio de Instrumentacao e Fisica Experimental de Particulas; Joint Institute for Nuclear Research - Russia; National Research Centre - Kurchatov Institute; Petersburg Nuclear Physics Institute; Russian Academy of Sciences; Institute for Nuclear Research of the Russian Academy of Sciences; Alikhanov Institute for Theoretical & Experimental Physics; Moscow Institute of Physics & Technology; National Research Nuclear University MEPhI (Moscow Engineering Physics Institute); Russian Academy of Science Lebedev Physical Institute; Lomonosov Moscow State University; Institute of High Energy Physics - IHEP; Tomsk Polytechnic University; Tomsk State University; University of Belgrade; Centro de Investigaciones Energeticas, Medioambientales Tecnologicas; Autonomous University of Madrid; University of Oviedo; Consejo Superior de Investigaciones Cientificas (CSIC); Universidad de Cantabria; CSIC - Instituto de Fisica de Cantabria (IFCA); University of Colombo; University Ruhuna; European Organization for Nuclear Research (CERN); Swiss Federal Institutes of Technology Domain; Paul Scherrer Institute; ETH Zurich; University of Zurich; National Central University; National Taiwan University; Chulalongkorn University; Cukurova University; Middle East Technical University; Bogazici University; Istanbul Technical University; Istanbul University; National Academy of Sciences Ukraine; Institute for Scintillation Materials of the National Academy of Sciences of Ukraine; Kharkov Institute of Physics & Technology; University of Bristol; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC); STFC Rutherford Appleton Laboratory; Imperial College London; Brunel University; Baylor University; Catholic University of America; University of Alabama Tuscaloosa; Boston University; Brown University; University of California System; University of California Davis; University of California Los Angeles; University of California Riverside; University of California San Diego; University of California Santa Barbara; California Institute of Technology; Carnegie Mellon University; University of Colorado System; University of Colorado Boulder; Cornell University; United States Department of Energy (DOE); University of Chicago; Fermi National Accelerator Laboratory; State University System of Florida; University of Florida; Florida International University; Florida State University; Florida Institute of Technology; University of Illinois System; University of Illinois Chicago; University of Illinois Chicago Hospital; University of Iowa; Johns Hopkins University; University of Kansas; Kansas State University; Lawrence Livermore National Laboratory; University System of Maryland; University of Maryland College Park; Massachusetts Institute of Technology (MIT); University of Minnesota System; University of Minnesota Twin Cities; University of Mississippi; University of Nebraska System; University of Nebraska Lincoln; State University of New York (SUNY) System; State University of New York (SUNY) Buffalo; Northeastern University; Northwestern University; University of Notre Dame; University System of Ohio; Ohio State University; Princeton University; University of Puerto Rico; University of Puerto Rico Mayaguez; Rice University; University of Rochester; Rutgers State University New Brunswick; University of Tennessee System; University of Tennessee Knoxville; Texas A&M University System; Texas A&M University College Station; Texas Tech University System; Texas Tech University; Vanderbilt University; University of Virginia; Wayne State University; University of Wisconsin System; University of Wisconsin Madison; Technische Universitat Wien; Universidade Estadual de Campinas; Universidade Federal do Rio Grande do Sul; Universidade Federal de Mato Grosso do Sul; Universidade Federal de Pelotas; University of Chinese Academy of Sciences, CAS; British University in Egypt; Ain Shams University; Purdue University System; Purdue University; Purdue University West Lafayette Campus; Universite de Haute-Alsace (UHA); Erzincan Binali Yildirim University; Brandenburg University of Technology Cottbus; Assiut University; Indian Institute of Technology (IIT) - Bhubaneswar; Institute of Physics Bhubaneswar (IOPB); Shoolini University; University of Hyderabad; Visva Bharati University; Italian National Agency New Technical Energy & Sustainable Economics Development; Warsaw University of Technology; Peter the Great St. Petersburg Polytechnic University; Budker Institute of Nuclear Physics; University of Siena; Eastern University, Sri Lanka; Sirnak University; Near East University; Beykent University; Istanbul Aydin University; Mersin University; Piri Reis University; Adiyaman University; Ozyegin University; Izmir Institute of Technology; Bozok University; Marmara University; Kafkas University; Istanbul Bilgi University; Hacettepe University; Durham University; Monash University; Karamanoglu Mehmetbey University; Bingol University; Sinop University; Mimar Sinan Guzel Sanatlar University; Nanjing Normal University; Qatar Foundation (QF); Texas A&M University Qatar; University of Science & Technology of Mazandaran
    Ultrarelativistic heavy ion collisions recreate in the laboratory the thermodynamical conditions prevailing in the early universe up to \({10}^{-6}\text{}\text{}\mathrm{sec}\), thereby allowing the study of the quark-gluon plasma (QGP), a state of quantum chromodynamics (QCD) matter with deconfined partons. The top quark, the heaviest elementary particle known, is accessible in nucleus-nucleus collisions at the CERN LHC, and constitutes a novel probe of the QGP. Here, we report the first evidence for the production of top quarks in nucleus-nucleus collisions, using lead-lead collision data at a nucleon-nucleon center-of-mass energy of 5.02 TeV recorded by the CMS experiment. Two methods are used to measure the cross section for top quark pair production (\({\sigma }_{t\overline{t}}\)) via the selection of charged leptons (electrons or muons) and bottom quarks. One method relies on the leptonic information alone, and the second one exploits, in addition, the presence of bottom quarks. The measured cross sections, \({\sigma }_{t\overline{t}}=2.5{4}_{-0.74}^{+0.84}\) and \({2.03}_{-0.64}^{+0.71}\text{}\text{}\mu b\), respectively, are compatible with expectations from scaled proton-proton data and QCD predictions.
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    First measurement of large area jet transverse momentum spectra in heavy-ion collisions
    (2021) CMS Collaboration; Buccilli, A.; Cooper, S.I.; Gleyzer, S.V.; Henderson, C.; Rumerio, P.; West, C.; University of Alabama Tuscaloosa
    Jet production in lead-lead (PbPb) and proton-proton (pp) collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV is studied with the CMS detector at the LHC, using PbPb and pp data samples corresponding to integrated luminosities of 404 μb\(^{−1}\) and 27.4 pb\(^{−1}\), respectively. Jets with different areas are reconstructed using the anti-\(k_{T}\) algorithm by varying the distance parameter R. The measurements are performed using jets with transverse momenta (\(p_{T}\)) greater than 200 GeV and in a pseudorapidity range of |η| < 2. To reveal the medium modification of the jet spectra in PbPb collisions, the properly normalized ratio of spectra from PbPb and pp data is used to extract jet nuclear modification factors as functions of the PbPb collision centrality, \(p_{T}\) and, for the first time, as a function of R up to 1.0. For the most central collisions, a strong suppression is observed for high-\(p_{T}\) jets reconstructed with all distance parameters, implying that a significant amount of jet energy is scattered to large angles. The dependence of jet suppression on R is expected to be sensitive to both the jet energy loss mechanism and the medium response, and so the data are compared to several modern event generators and analytic calculations. The models considered do not fully reproduce the data.
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    First measurement of the cross section for top quark pair production with additional charm jets using dileptonic final states in pp collisions at root s=13 TeV
    (Elsevier, 2021) CMS Collaboration; Buccilli, A.; Charaf, O.; Cooper, S.I.; Di Croce, D.; Gleyzer, S.V.; Henderson, C.; Perez, C.U.; Rumerio, P.; West, C.; Yerevan Physics Institute; Belarusian State University; University of Antwerp; Vrije Universiteit Brussel; Universite Libre de Bruxelles; Ghent University; Universite Catholique Louvain; Centro Brasileiro de Pesquisas Fisicas; Universidade do Estado do Rio de Janeiro; Universidade Estadual Paulista; Bulgarian Academy of Sciences; University of Sofia; Beihang University; Tsinghua University; Chinese Academy of Sciences; Institute of High Energy Physics, CAS; Peking University; Sun Yat Sen University; Fudan University; Zhejiang University; Universidad de los Andes (Colombia); Universidad de Antioquia; University of Split; University of Cyprus; Charles University Prague; Escuela Politecnica Nacional Ecuador; Egyptian Academy of Scientific Research & Technology (ASRT); Egyptian Knowledge Bank (EKB); Egyptian Network of High Energy Physics (ENHEP); Fayoum University; National Institute of Chemical Physics & Biophysics (NICPB); University of Helsinki; Helsinki Institute of Physics; Lappeenranta University of Technology; CEA; UDICE-French Research Universities; Universite Paris Saclay; Centre National de la Recherche Scientifique (CNRS); CNRS - National Institute of Nuclear and Particle Physics (IN2P3); Institut Polytechnique de Paris; Universites de Strasbourg Etablissements Associes; Universite de Strasbourg; Universite Claude Bernard Lyon 1; Georgian Technical University; RWTH Aachen University; Helmholtz Association; Deutsches Elektronen-Synchrotron (DESY); University of Hamburg; Karlsruhe Institute of Technology; National Centre of Scientific Research "Demokritos"; National & Kapodistrian University of Athens; National Technical University of Athens; University of Ioannina; Eotvos Lorand University; Eotvos Lorand Research Network; Hungarian Academy of Sciences; Hungarian Wigner Research Centre for Physics; Hungarian Institute for Nuclear Research; University of Debrecen; Eszterhazy Karoly Catholic University; Indian Institute of Science (IISC) - Bangalore; Homi Bhabha National Institute; National Institute of Science Education & Research (NISER); Panjab University; University of Delhi; Saha Institute of Nuclear Physics; Indian Institute of Technology System (IIT System); Indian Institute of Technology (IIT) - Madras; Bhabha Atomic Research Center (BARC); Tata Institute of Fundamental Research (TIFR); Indian Institute of Science Education & Research (IISER) Pune; Isfahan University of Technology; University College Dublin; Istituto Nazionale di Fisica Nucleare (INFN); Universita degli Studi di Bari Aldo Moro; Politecnico di Bari; University of Bologna; University of Catania; University of Florence; University of Genoa; University of Milano-Bicocca; University of Naples Federico II; University of Basilicata; Guglielmo Marconi University; University of Padua; University of Trento; University of Pavia; University of Perugia; University of Pisa; Scuola Normale Superiore di Pisa; University of Siena; Sapienza University Rome; University of Turin; University of Eastern Piedmont Amedeo Avogadro; University of Trieste; Kyungpook National University; Chonnam National University; Hanyang University; Korea University; Kyung Hee University; Sejong University; Seoul National University (SNU); University of Seoul; Yonsei University; Sungkyunkwan University (SKKU); American University of Middle East; Riga Technical University; Vilnius University; Universiti Malaya; Universidad de Sonora; CINVESTAV - Centro de Investigacion y de Estudios Avanzados del Instituto Politecnico Nacional; Universidad Iberoamericana Ciudad de Mexico; Benemerita Universidad Autonoma de Puebla; University of Montenegro; University of Auckland; University of Canterbury; National Centre for Physics - Pakistan; Quaid I Azam University; AGH University of Science & Technology; National Centre for Nuclear Research; University of Warsaw; Laboratorio de Instrumentacao e Fisica Experimental de Particulas; Joint Institute for Nuclear Research - Russia; National Research Centre - Kurchatov Institute; Petersburg Nuclear Physics Institute; Russian Academy of Sciences; Institute for Nuclear Research of the Russian Academy of Sciences; Alikhanov Institute for Theoretical & Experimental Physics; Moscow Institute of Physics & Technology; National Research Nuclear University MEPhI (Moscow Engineering Physics Institute); Russian Academy of Science Lebedev Physical Institute; Lomonosov Moscow State University; Tomsk Polytechnic University; Tomsk State University; University of Belgrade; Centro de Investigaciones Energeticas, Medioambientales Tecnologicas; Autonomous University of Madrid; University of Oviedo; Consejo Superior de Investigaciones Cientificas (CSIC); Universidad de Cantabria; CSIC - Instituto de Fisica de Cantabria (IFCA); University of Colombo; University Ruhuna; European Organization for Nuclear Research (CERN); Swiss Federal Institutes of Technology Domain; Paul Scherrer Institute; ETH Zurich; University of Zurich; National Central University; National Taiwan University; Chulalongkorn University; Cukurova University; Middle East Technical University; Bogazici University; Istanbul Technical University; Istanbul University; National Academy of Sciences Ukraine; Institute for Scintillation Materials of the National Academy of Sciences of Ukraine; Kharkov Institute of Physics & Technology; University of Bristol; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC); STFC Rutherford Appleton Laboratory; Imperial College London; Brunel University; Baylor University; Catholic University of America; University of Alabama Tuscaloosa; Boston University; Brown University; University of California System; University of California Davis; University of California Los Angeles; University of California Riverside; University of California San Diego; University of California Santa Barbara; California Institute of Technology; Carnegie Mellon University; University of Colorado System; University of Colorado Boulder; Cornell University; United States Department of Energy (DOE); University of Chicago; Fermi National Accelerator Laboratory; State University System of Florida; University of Florida; Florida State University; Florida Institute of Technology; University of Illinois System; University of Illinois Chicago; University of Iowa; Johns Hopkins University; University of Kansas; Kansas State University; Lawrence Livermore National Laboratory; University System of Maryland; University of Maryland College Park; Massachusetts Institute of Technology (MIT); University of Minnesota System; University of Minnesota Twin Cities; University of Mississippi; University of Nebraska System; University of Nebraska Lincoln; State University of New York (SUNY) System; State University of New York (SUNY) Buffalo; Northeastern University; Northwestern University; University of Notre Dame; University System of Ohio; Ohio State University; Princeton University; University of Puerto Rico; University of Puerto Rico Mayaguez; Purdue University System; Purdue University; Purdue University West Lafayette Campus; Rice University; University of Rochester; Rutgers State University New Brunswick; University of Tennessee System; University of Tennessee Knoxville; Texas A&M University System; Texas A&M University College Station; Texas Tech University System; Texas Tech University; Vanderbilt University; University of Virginia; Wayne State University; University of Wisconsin System; University of Wisconsin Madison; Technische Universitat Wien; Arab Academy for Science, Technology & Maritime Transport; Universidade Estadual de Campinas; Universidade Federal do Rio Grande do Sul; Universidade Federal de Mato Grosso do Sul; Nanjing Normal University; University of Chinese Academy of Sciences, CAS; Helwan University; Zewail City of Science & Technology; Ain Shams University; British University in Egypt; Universite de Haute-Alsace (UHA); Erzincan Binali Yildirim University; Brandenburg University of Technology Cottbus; Assiut University; Indian Institute of Technology (IIT) - Bhubaneswar; Institute of Physics Bhubaneswar (IOPB); Shoolini University; University of Hyderabad; Visva Bharati University; Indian Institute of Technology (IIT) - Bombay; Sharif University of Technology; University of Science & Technology of Mazandaran; Italian National Agency New Technical Energy & Sustainable Economics Development; Peter the Great St. Petersburg Polytechnic University; Budker Institute of Nuclear Physics; Eastern University, Sri Lanka; Ecole Polytechnique Federale de Lausanne; Universite de Savoie; Sirnak University; Near East University; Beykent University; Istanbul Aydin University; Mersin University; Piri Reis University; Adiyaman University; Ozyegin University; Izmir Institute of Technology; Necmettin Erbakan University; Bozok University; Marmara University; Kafkas University; Istanbul Bilgi University; Hacettepe University; University of Southampton; Monash University; Karamanoglu Mehmetbey University; Bingol University; Sinop University; Mimar Sinan Guzel Sanatlar University; Erciyes University; Qatar Foundation (QF); Texas A&M University Qatar
    The first measurement of the inclusive cross section for top quark pairs (\(t\stackrel{‾}{t}\)) produced in association with two additional charm jets is presented. The analysis uses the dileptonic final states of \(t\stackrel{‾}{t}\) events produced in proton-proton collisions at a centre-of-mass energy of 13 TeV. The data correspond to an integrated luminosity of \(41.5\phantom{\rule{0.25em}{0ex}}{\text{fb}}^{-1}\), recorded by the CMS experiment at the LHC. A new charm jet identification algorithm provides input to a neural network that is trained to distinguish among \(t\stackrel{‾}{t}\) events with two additional charm (\(t\stackrel{‾}{t}c\stackrel{‾}{c}\)), bottom (\(t\stackrel{‾}{t}b\stackrel{‾}{b}\)), and light-flavour or gluon (\(t\stackrel{‾}{t}\text{LL}\)) jets. By means of a template fitting procedure, the inclusive \(t\stackrel{‾}{t}c\stackrel{‾}{c}\), \(t\stackrel{‾}{t}b\stackrel{‾}{b}\), and \(t\stackrel{‾}{t}\text{LL}\) cross sections are simultaneously measured, together with their ratios to the inclusive \(t\stackrel{‾}{t}\) + two jets cross section. This provides measurements of the \(t\stackrel{‾}{t}c\stackrel{‾}{c}\) and \(t\stackrel{‾}{t}b\stackrel{‾}{b}\) cross sections of \(10.1±1.2\phantom{\rule{0.25em}{0ex}}\text{(stat)}±1.4\phantom{\rule{0.25em}{0ex}}\text{(syst)}\phantom{\rule{0.2em}{0ex}}\text{pb}\) and \(4.54±0.35\phantom{\rule{0.25em}{0ex}}\text{(stat)}±0.56\phantom{\rule{0.25em}{0ex}}\text{(syst)}\phantom{\rule{0.2em}{0ex}}\text{pb}\), respectively, in the full phase space. The results are compared and found to be consistent with predictions from two different matrix element generators with next-to-leading order accuracy in quantum chromodynamics, interfaced with a parton shower simulation.
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    In-medium modification of dijets in PbPb collisions at √s_NN = 5.02 TeV
    (2021) CMS Collaboration; Buccilli, A.; Charaf, O.; Cooper, S.I.; Gleyzer, S.V.; Henderson, C.; Rumerio, P.; West, C.; University of Alabama Tuscaloosa
    Modifications to the distribution of charged particles with respect to high transverse momentum (\(p_{T}\)) jets passing through a quark-gluon plasma are explored using the CMS detector. Back-to-back dijets are analyzed in lead-lead and proton-proton collisions at \(\sqrt{{s}_{\mathrm{NN}}}\) = 5.02 TeV via correlations of charged particles in bins of relative pseudorapidity and angular distance from the leading and subleading jet axes. In comparing the lead-lead and proton-proton collision results, modifications to the charged-particle relative distance distribution and to the momentum distributions around the jet axis are found to depend on the dijet momentum balance \(x_{j}\), which is the ratio between the subleading and leading jet \(p_{T}\). For events with \(x_{j}\) ≈ 1, these modifications are observed for both the leading and subleading jets. However, while subleading jets show significant modifications for events with a larger dijet momentum imbalance, much smaller modifications are found for the leading jets in these events.
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    Inclusive search for highly boosted Higgs bosons decaying to bottom quark-antiquark pairs in proton-proton collisions at √s = 13 TeV
    (2020) CMS Collaboration; Buccilli, A.; Charaf, O.; Cooper, S.I.; Gleyzer, S.V.; Henderson, C.; Rumerio, P.; West, C.; University of Alabama Tuscaloosa
    A search for standard model Higgs bosons (H) produced with transverse momentum (\(p_{T}\)) greater than 450 GeV and decaying to bottom quark-antiquark pairs ( \(b\overline{b}\) ) is performed using proton-proton collision data collected by the CMS experiment at the LHC at \(\sqrt{s}\) = 13 TeV. The data sample corresponds to an integrated luminosity of 137 fb⁻¹. The search is inclusive in the Higgs boson production mode. Highly Lorentz-boosted Higgs bosons decaying to \(b\overline{b}\) are reconstructed as single large-radius jets, and are identified using jet substructure and a dedicated b tagging technique based on a deep neural network. The method is validated with Z → \(b\overline{b}\) decays. For a Higgs boson mass of 125 GeV, an excess of events above the background assuming no Higgs boson production is observed with a local significance of 2.5 standard deviations (σ), while the expectation is 0.7. The corresponding signal strength and local significance with respect to the standard model expectation are μ H = 3.7 ± 1.2(stat) \({}_{-0.7}^{+0.8}\) (syst) \({}_{-0.5}^{+0.8}\) (theo) and 1.9 σ. Additionally, an unfolded differential cross section as a function of Higgs boson \(p_{T}\) for the gluon fusion production mode is presented, assuming the other production modes occur at the expected rates.
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    Investigation into the event-activity dependence of ϒ(nS) relative production in proton-proton collisions at √s = 7 TeV
    (2020) CMS Collaboration; Buccilli, A.; Cooper, S.I.; Gleyzer, S.V.; Henderson, C.; Rumerio, P.; West, C.; University of Alabama Tuscaloosa
    The ratios of the production cross sections between the excited ϒ(2S) and ϒ(3S) mesons and the ϒ(1S) ground state, detected via their decay into two muons, are studied as a function of the number of charged particles in the event. The data are from proton-proton collisions at \(\sqrt{s}\) = 7 TeV, corresponding to an integrated luminosity of 4.8 fb⁻¹, collected with the CMS detector at the LHC. Evidence of a decrease in these ratios as a function of the particle multiplicity is observed, more pronounced at low transverse momentum \({p}_{T}^{\mathrm{\mu \mu }}\). For ϒ(nS) mesons with \({p}_{T}^{\mathrm{\mu \mu }}\) > 7 GeV, where most of the data were collected, the correlation with multiplicity is studied as a function of the underlying event transverse sphericity and the number of particles in a cone around the ϒ(nS) direction. The ratios are found to be multiplicity independent for jet-like events. The mean \({p}_{T}^{\mathrm{\mu \mu }}\) values for the ϒ(nS) states as a function of particle multiplicity are also measured and found to grow more steeply as their mass increases.
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    Measurement of b jet shapes in proton-proton collisions at √s = 5.02 TeV
    (2021) CMS Collaboration; Buccilli, A.; Cooper, S.I.; Gleyzer, S.V.; Henderson, C.; Rumerio, P.; West, C.; University of Alabama Tuscaloosa
    We present the first study of charged-hadron production associated with jets originating from b quarks in proton-proton collisions at a center-of-mass energy of 5.02 TeV. The data sample used in this study was collected with the CMS detector at the CERN LHC and corresponds to an integrated luminosity of 27.4 pb −1. To characterize the jet substructure, the differential jet shapes, defined as the normalized transverse momentum distribution of charged hadrons as a function of angular distance from the jet axis, are measured for b jets. In addition to the jet shapes, the per-jet yields of charged particles associated with b jets are also quantified, again as a function of the angular distance with respect to the jet axis. Extracted jet shape and particle yield distributions for b jets are compared with results for inclusive jets, as well as with the predictions from the pythia and herwig++ event generators.
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    Measurement of B-c(2S)(+) and B-c*(2S)(+) cross section ratios in proton-proton collisions at root s=13 TeV
    (American Physical Society, 2020) CMS Collaboration; Buccilli, A.; Charaf, O.; Cooper, S.I.; Gleyzer, S.V.; Henderson, C.; Rumerio, P.; West, C.; Yerevan Physics Institute; Belarusian State University; University of Antwerp; Vrije Universiteit Brussel; Universite Libre de Bruxelles; Ghent University; Universite Catholique Louvain; Centro Brasileiro de Pesquisas Fisicas; Universidade do Estado do Rio de Janeiro; Universidade Estadual Paulista; Universidade Federal do ABC (UFABC); Bulgarian Academy of Sciences; University of Sofia; Beihang University; Tsinghua University; Chinese Academy of Sciences; Institute of High Energy Physics, CAS; Peking University; Sun Yat Sen University; Zhejiang University; Universidad de los Andes (Colombia); Universidad de Antioquia; University of Split; Rudjer Boskovic Institute; University of Cyprus; Charles University Prague; Escuela Politecnica Nacional Ecuador; Egyptian Academy of Scientific Research & Technology (ASRT); Egyptian Knowledge Bank (EKB); Egyptian Network of High Energy Physics (ENHEP); Fayoum University; National Institute of Chemical Physics & Biophysics (NICPB); University of Helsinki; Helsinki Institute of Physics; Lappeenranta University of Technology; CEA; UDICE-French Research Universities; Universite Paris Saclay; Centre National de la Recherche Scientifique (CNRS); CNRS - National Institute of Nuclear and Particle Physics (IN2P3); Universites de Strasbourg Etablissements Associes; Universite de Strasbourg; Universite Claude Bernard Lyon 1; Georgian Technical University; Ivane Javakhishvili Tbilisi State University; RWTH Aachen University; Helmholtz Association; Deutsches Elektronen-Synchrotron (DESY); University of Hamburg; Karlsruhe Institute of Technology; National Centre of Scientific Research "Demokritos"; National & Kapodistrian University of Athens; National Technical University of Athens; University of Ioannina; Eotvos Lorand University; Eotvos Lorand Research Network; Hungarian Academy of Sciences; Hungarian Wigner Research Centre for Physics; Hungarian Institute for Nuclear Research; University of Debrecen; Eszterhazy Karoly Catholic University; Indian Institute of Science (IISC) - Bangalore; Homi Bhabha National Institute; National Institute of Science Education & Research (NISER); Panjab University; University of Delhi; Saha Institute of Nuclear Physics; Indian Institute of Technology System (IIT System); Indian Institute of Technology (IIT) - Madras; Bhabha Atomic Research Center (BARC); Tata Institute of Fundamental Research (TIFR); Indian Institute of Science Education & Research (IISER) Pune; Isfahan University of Technology; University College Dublin; Istituto Nazionale di Fisica Nucleare (INFN); Universita degli Studi di Bari Aldo Moro; Politecnico di Bari; University of Bologna; University of Catania; University of Florence; University of Genoa; University of Milano-Bicocca; University of Naples Federico II; University of Basilicata; Guglielmo Marconi University; University of Padua; University of Trento; University of Pavia; University of Perugia; University of Pisa; Scuola Normale Superiore di Pisa; Sapienza University Rome; University of Turin; University of Eastern Piedmont Amedeo Avogadro; University of Trieste; Kyungpook National University; Chonnam National University; Hanyang University; Korea University; Kyung Hee University; Sejong University; Seoul National University (SNU); University of Seoul; Yonsei University; Sungkyunkwan University (SKKU); Riga Technical University; Vilnius University; Universiti Malaya; Universidad de Sonora; CINVESTAV - Centro de Investigacion y de Estudios Avanzados del Instituto Politecnico Nacional; Instituto Politecnico Nacional - Mexico; Universidad Iberoamericana Ciudad de Mexico; Benemerita Universidad Autonoma de Puebla; Universidad Autonoma de San Luis Potosi; University of Montenegro; University of Auckland; University of Canterbury; National Centre for Physics - Pakistan; Quaid I Azam University; AGH University of Science & Technology; National Centre for Nuclear Research; University of Warsaw; Laboratorio de Instrumentacao e Fisica Experimental de Particulas; Joint Institute for Nuclear Research - Russia; National Research Centre - Kurchatov Institute; Petersburg Nuclear Physics Institute; Russian Academy of Sciences; Institute for Nuclear Research of the Russian Academy of Sciences; Alikhanov Institute for Theoretical & Experimental Physics; Moscow Institute of Physics & Technology; National Research Nuclear University MEPhI (Moscow Engineering Physics Institute); Russian Academy of Science Lebedev Physical Institute; Lomonosov Moscow State University; Institute of High Energy Physics - IHEP; Tomsk Polytechnic University; Tomsk State University; University of Belgrade; Centro de Investigaciones Energeticas, Medioambientales Tecnologicas; Autonomous University of Madrid; University of Oviedo; Consejo Superior de Investigaciones Cientificas (CSIC); Universidad de Cantabria; CSIC - Instituto de Fisica de Cantabria (IFCA); University of Colombo; University Ruhuna; European Organization for Nuclear Research (CERN); Swiss Federal Institutes of Technology Domain; Paul Scherrer Institute; ETH Zurich; University of Zurich; National Central University; National Taiwan University; Chulalongkorn University; Cukurova University; Middle East Technical University; Bogazici University; Istanbul Technical University; Istanbul University; National Academy of Sciences Ukraine; Institute for Scintillation Materials of the National Academy of Sciences of Ukraine; Kharkov Institute of Physics & Technology; University of Bristol; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC); STFC Rutherford Appleton Laboratory; Imperial College London; Brunel University; Baylor University; Catholic University of America; University of Alabama Tuscaloosa; Boston University; Brown University; University of California System; University of California Davis; University of California Los Angeles; University of California Riverside; University of California San Diego; University of California Santa Barbara; California Institute of Technology; Carnegie Mellon University; University of Colorado System; University of Colorado Boulder; Cornell University; United States Department of Energy (DOE); University of Chicago; Fermi National Accelerator Laboratory; State University System of Florida; University of Florida; Florida International University; Florida State University; Florida Institute of Technology; University of Illinois System; University of Illinois Chicago; University of Illinois Chicago Hospital; University of Iowa; Johns Hopkins University; University of Kansas; Kansas State University; Lawrence Livermore National Laboratory; University System of Maryland; University of Maryland College Park; Massachusetts Institute of Technology (MIT); University of Minnesota System; University of Minnesota Twin Cities; University of Mississippi; University of Nebraska System; University of Nebraska Lincoln; State University of New York (SUNY) System; State University of New York (SUNY) Buffalo; Northeastern University; Northwestern University; University of Notre Dame; University System of Ohio; Ohio State University; Princeton University; University of Puerto Rico; University of Puerto Rico Mayaguez; Rice University; University of Rochester; Rutgers State University New Brunswick; University of Tennessee System; University of Tennessee Knoxville; Texas A&M University System; Texas A&M University College Station; Texas Tech University System; Texas Tech University; Vanderbilt University; University of Virginia; Wayne State University; University of Wisconsin System; University of Wisconsin Madison; Technische Universitat Wien; Universidade Estadual de Campinas; Universidade Federal do Rio Grande do Sul; Universidade Federal de Mato Grosso do Sul; Universidade Federal de Pelotas; University of Chinese Academy of Sciences, CAS; British University in Egypt; Ain Shams University; Purdue University System; Purdue University; Purdue University West Lafayette Campus; Universite de Haute-Alsace (UHA); Erzincan Binali Yildirim University; Brandenburg University of Technology Cottbus; Assiut University; Indian Institute of Technology (IIT) - Bhubaneswar; Institute of Physics Bhubaneswar (IOPB); Shoolini University; University of Hyderabad; Visva Bharati University; Italian National Agency New Technical Energy & Sustainable Economics Development; Warsaw University of Technology; Peter the Great St. Petersburg Polytechnic University; Budker Institute of Nuclear Physics; University of Siena; Eastern University, Sri Lanka; Sirnak University; Near East University; Beykent University; Istanbul Aydin University; Mersin University; Piri Reis University; Adiyaman University; Ozyegin University; Izmir Institute of Technology; Bozok University; Marmara University; Kafkas University; Istanbul Bilgi University; Hacettepe University; Durham University; Monash University; Karamanoglu Mehmetbey University; Bingol University; Sinop University; Mimar Sinan Guzel Sanatlar University; Nanjing Normal University; Qatar Foundation (QF); Texas A&M University Qatar; University of Science & Technology of Mazandaran
    The ratios of the \({B}_{c}{\left(2S\right)}^{+}\) to \({B}_{c}^{+}\), \({B}_{c}^{*}{\left(2S\right)}^{+}\) to \({B}_{c}^{+}\), and \({B}_{c}^{*}{\left(2S\right)}^{+}\) to \({B}_{c}{\left(2S\right)}^{+}\) production cross sections are measured in proton-proton collisions at \(\sqrt{s}=13\text{}\text{}\mathrm{TeV}\), using a data sample collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of \(143\text{}\text{}{\mathrm{fb}}^{-1}\). The three measurements are made in the \({B}_{c}^{+}\) meson phase space region defined by the transverse momentum \({p}_{T}>15\text{}\text{}\mathrm{GeV}\) and absolute rapidity \(|y|<2.4\), with the excited \({B}_{c}^{\left(*\right)}{\left(2S\right)}^{+}\) states reconstructed through the \({B}_{c}^{\left(*\right)+}{\pi }^{+}{\pi }^{-}\), followed by the \({B}_{c}^{+}\to J/\psi {\pi }^{+}\) and \(J/\psi \to {\mu }^{+}{\mu }^{-}\) decays. The \({B}_{c}{\left(2S\right)}^{+}\) to \({B}_{c}^{+}\), \({B}_{c}^{*}{\left(2S\right)}^{+}\) to \({B}_{c}^{+}\), and \({B}_{c}^{*}{\left(2S\right)}^{+}\) to \({B}_{c}{\left(2S\right)}^{+}\) cross section ratios, including the unknown \({B}_{c}^{\left(*\right)}{\left(2S\right)}^{+}\to {B}_{c}^{\left(*\right)+}{\pi }^{+}{\pi }^{-}\) branching fractions, are \(\left(3.47±0.63\left(\mathrm{stat}\right)±0.33\left(\mathrm{syst}\right)\right)%\), \(\left(4.69±0.71\left(\mathrm{stat}\right)±0.56\left(\mathrm{syst}\right)\right)%\), and \(1.35±0.32\left(\mathrm{stat}\right)±\phantom{\rule{0ex}{0ex}}0.09\left(\mathrm{syst}\right)\), respectively. None of these ratios shows a significant dependence on the \({p}_{T}\) or \(|y|\) of the \({B}_{c}^{+}\) meson. The normalized dipion invariant mass distributions from the decays \({B}_{c}^{\left(*\right)}{\left(2S\right)}^{+}\to {B}_{c}^{\left(*\right)+}{\pi }^{+}{\pi }^{-}\) are also reported.
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    Measurement of CKM matrix elements in single top quark t-channel production in proton-proton collisions at root s=13 TeV
    (Elsevier, 2020) CMS Collaboration; Buccilli, A.; Cooper, S.I.; Gleyzer, S.V.; Henderson, C.; Rumerio, P.; West, C.; Yerevan Physics Institute; Belarusian State University; University of Antwerp; Vrije Universiteit Brussel; Universite Libre de Bruxelles; Ghent University; Universite Catholique Louvain; Centro Brasileiro de Pesquisas Fisicas; Universidade do Estado do Rio de Janeiro; Universidade Estadual Paulista; Universidade Federal do ABC (UFABC); Bulgarian Academy of Sciences; University of Sofia; Beihang University; Tsinghua University; Chinese Academy of Sciences; Institute of High Energy Physics, CAS; Peking University; Zhejiang University; Universidad de los Andes (Colombia); Universidad de Antioquia; University of Split; Rudjer Boskovic Institute; University of Cyprus; Charles University Prague; Escuela Politecnica Nacional Ecuador; Egyptian Academy of Scientific Research & Technology (ASRT); Egyptian Knowledge Bank (EKB); Egyptian Network of High Energy Physics (ENHEP); National Institute of Chemical Physics & Biophysics (NICPB); University of Helsinki; Helsinki Institute of Physics; Lappeenranta University of Technology; CEA; UDICE-French Research Universities; Universite Paris Saclay; Centre National de la Recherche Scientifique (CNRS); CNRS - National Institute of Nuclear and Particle Physics (IN2P3); Universites de Strasbourg Etablissements Associes; Universite de Strasbourg; Universite Claude Bernard Lyon 1; Georgian Technical University; Ivane Javakhishvili Tbilisi State University; RWTH Aachen University; Helmholtz Association; Deutsches Elektronen-Synchrotron (DESY); University of Hamburg; Karlsruhe Institute of Technology; National Centre of Scientific Research "Demokritos"; National & Kapodistrian University of Athens; National Technical University of Athens; University of Ioannina; Eotvos Lorand University; Eotvos Lorand Research Network; Hungarian Academy of Sciences; Hungarian Wigner Research Centre for Physics; Hungarian Institute for Nuclear Research; University of Debrecen; Eszterhazy Karoly Catholic University; Indian Institute of Science (IISC) - Bangalore; Homi Bhabha National Institute; National Institute of Science Education & Research (NISER); Panjab University; University of Delhi; Saha Institute of Nuclear Physics; Indian Institute of Technology System (IIT System); Indian Institute of Technology (IIT) - Madras; Bhabha Atomic Research Center (BARC); Tata Institute of Fundamental Research (TIFR); Indian Institute of Science Education & Research (IISER) Pune; University College Dublin; Istituto Nazionale di Fisica Nucleare (INFN); Universita degli Studi di Bari Aldo Moro; Politecnico di Bari; University of Bologna; University of Catania; University of Florence; University of Genoa; University of Milano-Bicocca; University of Naples Federico II; University of Basilicata; Guglielmo Marconi University; University of Padua; University of Trento; University of Pavia; University of Perugia; University of Pisa; Scuola Normale Superiore di Pisa; Sapienza University Rome; University of Turin; University of Eastern Piedmont Amedeo Avogadro; University of Trieste; Kyungpook National University; Chonnam National University; Hanyang University; Korea University; Kyung Hee University; Sejong University; Seoul National University (SNU); University of Seoul; Sungkyunkwan University (SKKU); Riga Technical University; Vilnius University; Universiti Malaya; Universidad de Sonora; CINVESTAV - Centro de Investigacion y de Estudios Avanzados del Instituto Politecnico Nacional; Instituto Politecnico Nacional - Mexico; Universidad Iberoamericana Ciudad de Mexico; Benemerita Universidad Autonoma de Puebla; Universidad Autonoma de San Luis Potosi; University of Montenegro; University of Auckland; University of Canterbury; National Centre for Physics - Pakistan; Quaid I Azam University; AGH University of Science & Technology; National Centre for Nuclear Research; University of Warsaw; Laboratorio de Instrumentacao e Fisica Experimental de Particulas; Joint Institute for Nuclear Research - Russia; National Research Centre - Kurchatov Institute; Petersburg Nuclear Physics Institute; Russian Academy of Sciences; Institute for Nuclear Research of the Russian Academy of Sciences; Alikhanov Institute for Theoretical & Experimental Physics; Moscow Institute of Physics & Technology; National Research Nuclear University MEPhI (Moscow Engineering Physics Institute); Russian Academy of Science Lebedev Physical Institute; Lomonosov Moscow State University; Institute of High Energy Physics - IHEP; Tomsk Polytechnic University; Tomsk State University; University of Belgrade; Centro de Investigaciones Energeticas, Medioambientales Tecnologicas; Autonomous University of Madrid; University of Oviedo; Consejo Superior de Investigaciones Cientificas (CSIC); Universidad de Cantabria; CSIC - Instituto de Fisica de Cantabria (IFCA); University of Colombo; University Ruhuna; European Organization for Nuclear Research (CERN); Swiss Federal Institutes of Technology Domain; Paul Scherrer Institute; ETH Zurich; University of Zurich; National Central University; National Taiwan University; Chulalongkorn University; Cukurova University; Middle East Technical University; Bogazici University; Istanbul Technical University; Istanbul University; National Academy of Sciences Ukraine; Institute for Scintillation Materials of the National Academy of Sciences of Ukraine; Kharkov Institute of Physics & Technology; University of Bristol; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC); STFC Rutherford Appleton Laboratory; Imperial College London; Brunel University; Baylor University; Catholic University of America; University of Alabama Tuscaloosa; Boston University; Brown University; University of California System; University of California Davis; University of California Los Angeles; University of California Riverside; University of California San Diego; University of California Santa Barbara; California Institute of Technology; Carnegie Mellon University; University of Colorado System; University of Colorado Boulder; Cornell University; United States Department of Energy (DOE); University of Chicago; Fermi National Accelerator Laboratory; State University System of Florida; University of Florida; Florida International University; Florida State University; Florida Institute of Technology; University of Illinois System; University of Illinois Chicago; University of Illinois Chicago Hospital; University of Iowa; Johns Hopkins University; University of Kansas; Kansas State University; Lawrence Livermore National Laboratory; University System of Maryland; University of Maryland College Park; Massachusetts Institute of Technology (MIT); University of Minnesota System; University of Minnesota Twin Cities; University of Mississippi; University of Nebraska System; University of Nebraska Lincoln; State University of New York (SUNY) System; State University of New York (SUNY) Buffalo; Northeastern University; Northwestern University; University of Notre Dame; University System of Ohio; Ohio State University; Princeton University; University of Puerto Rico; University of Puerto Rico Mayaguez; Purdue University System; Purdue University; Purdue University West Lafayette Campus; Rice University; University of Rochester; Rutgers State University New Brunswick; University of Tennessee System; University of Tennessee Knoxville; Texas A&M University System; Texas A&M University College Station; Texas Tech University System; Texas Tech University; Vanderbilt University; University of Virginia; Wayne State University; University of Wisconsin System; University of Wisconsin Madison; Technische Universitat Wien; Universidade Estadual de Campinas; Universidade Federal do Rio Grande do Sul; Universidade Federal de Mato Grosso do Sul; Universidade Federal de Pelotas; University of Chinese Academy of Sciences, CAS; Suez University; Universite de Haute-Alsace (UHA); Ilia State University; Erzincan Binali Yildirim University; Brandenburg University of Technology Cottbus; Indian Institute of Technology (IIT) - Bhubaneswar; Institute of Physics Bhubaneswar (IOPB); Shoolini University; Visva Bharati University; Isfahan University of Technology; Italian National Agency New Technical Energy & Sustainable Economics Development; Agensi Nuklear Malaysia; Warsaw University of Technology; Peter the Great St. Petersburg Polytechnic University; Budker Institute of Nuclear Physics; University of Siena; Mehmet Akif Ersoy University; Adiyaman University; Sirnak University; Beykent University; Istanbul Aydin University; Mersin University; Piri Reis University; Gaziosmanpasa University; Ozyegin University; Izmir Institute of Technology; Marmara University; Kafkas University; Istanbul Bilgi University; Hacettepe University; University of Southampton; Monash University; Karamanoglu Mehmetbey University; Bingol University; Sinop University; Mimar Sinan Guzel Sanatlar University; Qatar Foundation (QF); Texas A&M University Qatar; University of Hyderabad
    The first direct, model-independent measurement is presented of the modulus of the Cabibbo–Kobayashi–Maskawa (CKM) matrix elements \(|\eta |{V}_{\text{t}\text{b}}\), \(|\eta |{V}_{\text{t}\text{d}}\), and \(|\eta |{V}_{\text{t}\text{s}}\), in final states enriched in single top quark t-channel events. The analysis uses proton-proton collision data from the LHC, collected during 2016 by the CMS experiment, at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb\({-1}\). Processes directly sensitive to these matrix elements are considered at both the production and decay vertices of the top quark. In the standard model hypothesis of CKM unitarity, a lower limit of \(|\eta |{V}_{\text{t}\text{b}}>0.970\) is measured at the 95% confidence level. Several theories beyond the standard model are considered, and by releasing all constraints among the involved parameters, the values \(|\eta |{V}_{\text{t}\text{b}}=0.988±0.024\), and \(|\eta |{{V}_{\text{t}\text{d}}}^{2}+|\eta |{{V}_{\text{t}\text{s}}}^{2}=0.06±0.06\), where the uncertainties include both statistical and systematic components, are measured.
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    Measurement of differential cross sections for Z bosons produced in association with charm jets in pp collisions at √s = 13 TeV
    (2021) CMS Collaboration; Buccilli, A.; Charaf, O.; Cooper, S.I.; Gleyzer, S.V.; Henderson, C.; Rumerio, P.; West, C.; University of Alabama Tuscaloosa
    Measurements are presented of differential cross sections for the production of Z bosons in association with at least one jet initiated by a charm quark in pp collisions at \(\sqrt{s}\) = 13 TeV. The data recorded by the CMS experiment at the LHC correspond to an integrated luminosity of 35.9 fb⁻¹. The final states contain a pair of electrons or muons that are the decay products of a Z boson, and a jet consistent with being initiated by a charm quark produced in the hard interaction. Differential cross sections as a function of the transverse momentum \(p_{T}\) of the Z boson and \(p_{T}\) of the charm jet are compared with predictions from Monte Carlo event generators. The inclusive production cross section 405.4 ± 5.6 (stat) ± 24.3 (exp) ± 3.7 (theo) pb, is measured in a fiducial region requiring both leptons to have pseudorapidity |η| < 2.4 and \(p_{T}\) > 10 GeV, at least one lepton with \(p_{T}\) > 26 GeV, and a mass of the pair in the range 71–111 GeV, while the charm jet is required to have \(p_{T}\) > 30 GeV and |η| < 2.4. These are the first measurements of these cross sections in proton-proton collisions at 13 TeV.
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    Measurement of differential t(t)over-bar production cross sections using top quarks at large transverse momenta in pp collisions at root s=13 TeV
    (American Physical Society, 2021) CMS Collaboration; Buccilli, A.; Charaf, O.; Cooper, S.I.; Gleyzer, S.V.; Henderson, C.; Rumerio, P.; West, C.; Yerevan Physics Institute; Belarusian State University; University of Antwerp; Vrije Universiteit Brussel; Universite Libre de Bruxelles; Ghent University; Universite Catholique Louvain; Centro Brasileiro de Pesquisas Fisicas; Universidade do Estado do Rio de Janeiro; Universidade Estadual Paulista; Universidade Federal do ABC (UFABC); Bulgarian Academy of Sciences; University of Sofia; Beihang University; Tsinghua University; Chinese Academy of Sciences; Institute of High Energy Physics, CAS; Peking University; Sun Yat Sen University; Fudan University; Zhejiang University; Universidad de los Andes (Colombia); Universidad de Antioquia; University of Split; Rudjer Boskovic Institute; University of Cyprus; Charles University Prague; Escuela Politecnica Nacional Ecuador; Egyptian Academy of Scientific Research & Technology (ASRT); Egyptian Knowledge Bank (EKB); Egyptian Network of High Energy Physics (ENHEP); Fayoum University; National Institute of Chemical Physics & Biophysics (NICPB); University of Helsinki; Helsinki Institute of Physics; Lappeenranta University of Technology; CEA; UDICE-French Research Universities; Universite Paris Saclay; Centre National de la Recherche Scientifique (CNRS); CNRS - National Institute of Nuclear and Particle Physics (IN2P3); Universites de Strasbourg Etablissements Associes; Universite de Strasbourg; Universite Claude Bernard Lyon 1; Georgian Technical University; Ivane Javakhishvili Tbilisi State University; RWTH Aachen University; Helmholtz Association; Deutsches Elektronen-Synchrotron (DESY); University of Hamburg; Karlsruhe Institute of Technology; National Centre of Scientific Research "Demokritos"; National & Kapodistrian University of Athens; National Technical University of Athens; University of Ioannina; Eotvos Lorand University; Eotvos Lorand Research Network; Hungarian Academy of Sciences; Hungarian Wigner Research Centre for Physics; Hungarian Institute for Nuclear Research; University of Debrecen; Eszterhazy Karoly Catholic University; Indian Institute of Science (IISC) - Bangalore; Homi Bhabha National Institute; National Institute of Science Education & Research (NISER); Panjab University; University of Delhi; Saha Institute of Nuclear Physics; Indian Institute of Technology System (IIT System); Indian Institute of Technology (IIT) - Madras; Bhabha Atomic Research Center (BARC); Tata Institute of Fundamental Research (TIFR); Indian Institute of Science Education & Research (IISER) Pune; Isfahan University of Technology; University College Dublin; Istituto Nazionale di Fisica Nucleare (INFN); Universita degli Studi di Bari Aldo Moro; Politecnico di Bari; University of Bologna; University of Catania; University of Florence; University of Genoa; University of Milano-Bicocca; University of Naples Federico II; University of Basilicata; Guglielmo Marconi University; University of Padua; University of Trento; University of Pavia; University of Perugia; University of Pisa; Scuola Normale Superiore di Pisa; Sapienza University Rome; University of Turin; University of Eastern Piedmont Amedeo Avogadro; University of Trieste; Kyungpook National University; Chonnam National University; Hanyang University; Korea University; Kyung Hee University; Sejong University; Seoul National University (SNU); University of Seoul; Sungkyunkwan University (SKKU); Riga Technical University; Vilnius University; Universiti Malaya; Universidad de Sonora; CINVESTAV - Centro de Investigacion y de Estudios Avanzados del Instituto Politecnico Nacional; Instituto Politecnico Nacional - Mexico; Universidad Iberoamericana Ciudad de Mexico; Benemerita Universidad Autonoma de Puebla; Universidad Autonoma de San Luis Potosi; University of Montenegro; University of Auckland; University of Canterbury; National Centre for Physics - Pakistan; Quaid I Azam University; AGH University of Science & Technology; National Centre for Nuclear Research; University of Warsaw; Laboratorio de Instrumentacao e Fisica Experimental de Particulas; Joint Institute for Nuclear Research - Russia; National Research Centre - Kurchatov Institute; Petersburg Nuclear Physics Institute; Russian Academy of Sciences; Institute for Nuclear Research of the Russian Academy of Sciences; Alikhanov Institute for Theoretical & Experimental Physics; Moscow Institute of Physics & Technology; National Research Nuclear University MEPhI (Moscow Engineering Physics Institute); Russian Academy of Science Lebedev Physical Institute; Lomonosov Moscow State University; Institute of High Energy Physics - IHEP; Tomsk Polytechnic University; Tomsk State University; University of Belgrade; Centro de Investigaciones Energeticas, Medioambientales Tecnologicas; Autonomous University of Madrid; University of Oviedo; Consejo Superior de Investigaciones Cientificas (CSIC); Universidad de Cantabria; CSIC - Instituto de Fisica de Cantabria (IFCA); University of Colombo; University Ruhuna; European Organization for Nuclear Research (CERN); Swiss Federal Institutes of Technology Domain; Paul Scherrer Institute; ETH Zurich; University of Zurich; National Central University; National Taiwan University; Chulalongkorn University; Cukurova University; Middle East Technical University; Bogazici University; Istanbul Technical University; Istanbul University; National Academy of Sciences Ukraine; Institute for Scintillation Materials of the National Academy of Sciences of Ukraine; Kharkov Institute of Physics & Technology; University of Bristol; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC); STFC Rutherford Appleton Laboratory; Imperial College London; Brunel University; Baylor University; Catholic University of America; University of Alabama Tuscaloosa; Boston University; Brown University; University of California System; University of California Davis; University of California Los Angeles; University of California Riverside; University of California San Diego; University of California Santa Barbara; California Institute of Technology; Carnegie Mellon University; University of Colorado System; University of Colorado Boulder; Cornell University; United States Department of Energy (DOE); University of Chicago; Fermi National Accelerator Laboratory; State University System of Florida; University of Florida; Florida International University; Florida State University; Florida Institute of Technology; University of Illinois System; University of Illinois Chicago; University of Iowa; Johns Hopkins University; University of Kansas; Kansas State University; Lawrence Livermore National Laboratory; University System of Maryland; University of Maryland College Park; Massachusetts Institute of Technology (MIT); University of Minnesota System; University of Minnesota Twin Cities; University of Mississippi; University of Nebraska System; University of Nebraska Lincoln; State University of New York (SUNY) System; State University of New York (SUNY) Buffalo; Northeastern University; Northwestern University; University of Notre Dame; University System of Ohio; Ohio State University; Princeton University; University of Puerto Rico; University of Puerto Rico Mayaguez; Purdue University System; Purdue University; Purdue University West Lafayette Campus; Rice University; University of Rochester; Rutgers State University New Brunswick; University of Tennessee System; University of Tennessee Knoxville; Texas A&M University System; Texas A&M University College Station; Texas Tech University System; Texas Tech University; Vanderbilt University; University of Virginia; Wayne State University; University of Wisconsin System; University of Wisconsin Madison; Technische Universitat Wien; Arab Academy for Science, Technology & Maritime Transport; Universidade Estadual de Campinas; Universidade Federal do Rio Grande do Sul; Universidade Federal de Mato Grosso do Sul; Universidade Federal de Pelotas; University of Chinese Academy of Sciences, CAS; Helwan University; Zewail City of Science & Technology; Ain Shams University; Universite de Haute-Alsace (UHA); Erzincan Binali Yildirim University; Brandenburg University of Technology Cottbus; Assiut University; Indian Institute of Technology (IIT) - Bhubaneswar; Institute of Physics Bhubaneswar (IOPB); Shoolini University; University of Hyderabad; Visva Bharati University; Indian Institute of Technology (IIT) - Bombay; University of Science & Technology of Mazandaran; Warsaw University of Technology; Academy of Sciences of Uzbekistan; Peter the Great St. Petersburg Polytechnic University; Budker Institute of Nuclear Physics; University of Siena; Eastern University, Sri Lanka; Sirnak University; Near East University; Beykent University; Istanbul Aydin University; Mersin University; Piri Reis University; Adiyaman University; Ozyegin University; Izmir Institute of Technology; Necmettin Erbakan University; Bozok University; Marmara University; Kafkas University; Istanbul Bilgi University; Hacettepe University; University of Southampton; Durham University; Monash University; Karamanoglu Mehmetbey University; Bingol University; Sinop University; Mimar Sinan Guzel Sanatlar University; Nanjing Normal University; Qatar Foundation (QF); Texas A&M University Qatar
    A measurement is reported of differential top quark pair \(t\overline{t}\) production cross sections, where top quarks are produced at large transverse momenta. The data collected with the CMS detector at the LHC are from \(pp\) collisions at a center-of-mass energy of \(13\text{}\text{}\mathrm{TeV}\) corresponding to an integrated luminosity of \(35.9\text{}\text{}{\mathrm{fb}}^{-1}\). The measurement uses events where at least one top quark decays as \(t\to Wb\to q{\overline{q}}^{\prime }b\) and is reconstructed as a large-radius jet with transverse momentum in excess of 400 GeV. The second top quark is required to decay either in a similar way or leptonically, as inferred from a reconstructed electron or muon, a bottom quark jet, and missing transverse momentum due to the undetected neutrino. The cross section is extracted as a function of kinematic variables of individual top quarks or of the \(t\overline{t}\) system. The results are presented at the particle level, within a region of phase space close to that of the experimental acceptance, and at the parton level and are compared to various theoretical models. In both decay channels, the observed absolute cross sections are significantly lower than the predictions from theory, while the normalized differential measurements are well described.
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    Measurement of quark- and gluon-like jet fractions using jet charge in PbPb and pp collisions at 5.02 TeV
    (2020) CMS Collaboration; Buccilli, A.; Cooper, S.I.; Gleyzer, S.V.; Henderson, C.; Rumerio, P.; West, C.; University of Alabama Tuscaloosa
    The momentum-weighted sum of the electric charges of particles inside a jet, known as jet charge, is sensitive to the electric charge of the particle initiating the parton shower. This paper presents jet charge distributions in \(\sqrt{{s}_{\mathrm{NN}}}\) = 5.02 TeV lead-lead (PbPb) and proton-proton (pp) collisions recorded with the CMS detector at the LHC. These data correspond to integrated luminosities of 404 μb\(^{−1}\) and 27.4 pb\(^{−1}\) for PbPb and pp collisions, respectively. Leveraging the sensitivity of the jet charge to fundamental differences in the electric charges of quarks and gluons, the jet charge distributions from simulated events are used as templates to extract the quark- and gluon-like jet fractions from data. The modification of these jet fractions is examined by comparing pp and PbPb data as a function of the overlap of the colliding Pb nuclei (centrality). This measurement tests the color charge dependence of jet energy loss due to interactions with the quark-gluon plasma. No significant modification between different centrality classes and with respect to pp results is observed in the extracted quark- and gluon-like jet fractions.
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    Measurement of the Higgs boson production rate in association with top quarks in final states with electrons, muons, and hadronically decaying tau leptons at root s=13TeV
    (Springer, 2021) CMS Collaboration; Buccilli, A.; Charaf, O.; Cooper, S.I.; Gleyzer, S.V.; Henderson, C.; Rumerio, P.; West, C.; European Organization for Nuclear Research (CERN); Yerevan Physics Institute; Belarusian State University; University of Antwerp; Vrije Universiteit Brussel; Universite Libre de Bruxelles; Ghent University; Universite Catholique Louvain; Centro Brasileiro de Pesquisas Fisicas; Universidade do Estado do Rio de Janeiro; Universidade Estadual Paulista; Universidade Federal do ABC (UFABC); Bulgarian Academy of Sciences; University of Sofia; Beihang University; Tsinghua University; Chinese Academy of Sciences; Institute of High Energy Physics, CAS; Peking University; Sun Yat Sen University; Fudan University; Zhejiang University; Universidad de los Andes (Colombia); Universidad de Antioquia; University of Split; Rudjer Boskovic Institute; University of Cyprus; Charles University Prague; Escuela Politecnica Nacional Ecuador; Egyptian Academy of Scientific Research & Technology (ASRT); Egyptian Knowledge Bank (EKB); Egyptian Network of High Energy Physics (ENHEP); Fayoum University; National Institute of Chemical Physics & Biophysics (NICPB); University of Helsinki; Helsinki Institute of Physics; Lappeenranta University of Technology; CEA; UDICE-French Research Universities; Universite Paris Saclay; Centre National de la Recherche Scientifique (CNRS); CNRS - National Institute of Nuclear and Particle Physics (IN2P3); Institut Polytechnique de Paris; Universites de Strasbourg Etablissements Associes; Universite de Strasbourg; Universite Claude Bernard Lyon 1; Georgian Technical University; RWTH Aachen University; Helmholtz Association; Deutsches Elektronen-Synchrotron (DESY); University of Hamburg; Karlsruhe Institute of Technology; National Centre of Scientific Research "Demokritos"; National & Kapodistrian University of Athens; National Technical University of Athens; University of Ioannina; Eotvos Lorand University; Eotvos Lorand Research Network; Hungarian Academy of Sciences; Hungarian Wigner Research Centre for Physics; Hungarian Institute for Nuclear Research; University of Debrecen; Eszterhazy Karoly Catholic University; Indian Institute of Science (IISC) - Bangalore; Homi Bhabha National Institute; National Institute of Science Education & Research (NISER); Panjab University; University of Delhi; Saha Institute of Nuclear Physics; Indian Institute of Technology System (IIT System); Indian Institute of Technology (IIT) - Madras; Bhabha Atomic Research Center (BARC); Tata Institute of Fundamental Research (TIFR); Indian Institute of Science Education & Research (IISER) Pune; Isfahan University of Technology; University College Dublin; Istituto Nazionale di Fisica Nucleare (INFN); Universita degli Studi di Bari Aldo Moro; Politecnico di Bari; University of Bologna; University of Catania; University of Florence; University of Genoa; University of Milano-Bicocca; University of Naples Federico II; University of Basilicata; Guglielmo Marconi University; University of Padua; University of Trento; University of Pavia; University of Perugia; University of Pisa; Scuola Normale Superiore di Pisa; Sapienza University Rome; University of Turin; University of Eastern Piedmont Amedeo Avogadro; University of Trieste; Kyungpook National University; Chonnam National University; Hanyang University; Korea University; Kyung Hee University; Sejong University; Seoul National University (SNU); University of Seoul; Yonsei University; Sungkyunkwan University (SKKU); Riga Technical University; Vilnius University; Universiti Malaya; Universidad de Sonora; CINVESTAV - Centro de Investigacion y de Estudios Avanzados del Instituto Politecnico Nacional; Instituto Politecnico Nacional - Mexico; Universidad Iberoamericana Ciudad de Mexico; Benemerita Universidad Autonoma de Puebla; Universidad Autonoma de San Luis Potosi; University of Montenegro; University of Auckland; University of Canterbury; National Centre for Physics - Pakistan; Quaid I Azam University; AGH University of Science & Technology; National Centre for Nuclear Research; University of Warsaw; Laboratorio de Instrumentacao e Fisica Experimental de Particulas; Joint Institute for Nuclear Research - Russia; National Research Centre - Kurchatov Institute; Petersburg Nuclear Physics Institute; Russian Academy of Sciences; Institute for Nuclear Research of the Russian Academy of Sciences; Alikhanov Institute for Theoretical & Experimental Physics; Moscow Institute of Physics & Technology; National Research Nuclear University MEPhI (Moscow Engineering Physics Institute); Russian Academy of Science Lebedev Physical Institute; Lomonosov Moscow State University; Novosibirsk State University; Institute of High Energy Physics - IHEP; Tomsk Polytechnic University; Tomsk State University; University of Belgrade; Centro de Investigaciones Energeticas, Medioambientales Tecnologicas; Autonomous University of Madrid; University of Oviedo; Consejo Superior de Investigaciones Cientificas (CSIC); Universidad de Cantabria; CSIC - Instituto de Fisica de Cantabria (IFCA); University of Colombo; University Ruhuna; Swiss Federal Institutes of Technology Domain; Paul Scherrer Institute; ETH Zurich; University of Zurich; National Central University; National Taiwan University; Chulalongkorn University; Cukurova University; Middle East Technical University; Bogazici University; Istanbul Technical University; Istanbul University; National Academy of Sciences Ukraine; Institute for Scintillation Materials of the National Academy of Sciences of Ukraine; Kharkov Institute of Physics & Technology; University of Bristol; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC); STFC Rutherford Appleton Laboratory; Imperial College London; Brunel University; Baylor University; Catholic University of America; University of Alabama Tuscaloosa; Boston University; Brown University; University of California System; University of California Davis; University of California Los Angeles; University of California Riverside; University of California San Diego; University of California Santa Barbara; California Institute of Technology; Carnegie Mellon University; University of Colorado System; University of Colorado Boulder; Cornell University; United States Department of Energy (DOE); University of Chicago; Fermi National Accelerator Laboratory; State University System of Florida; University of Florida; Florida State University; Florida Institute of Technology; University of Illinois System; University of Illinois Chicago; University of Illinois Chicago Hospital; University of Iowa; Johns Hopkins University; University of Kansas; Kansas State University; Lawrence Livermore National Laboratory; University System of Maryland; University of Maryland College Park; Massachusetts Institute of Technology (MIT); University of Minnesota System; University of Minnesota Twin Cities; University of Mississippi; University of Nebraska System; University of Nebraska Lincoln; State University of New York (SUNY) System; State University of New York (SUNY) Buffalo; Northeastern University; Northwestern University; University of Notre Dame; University System of Ohio; Ohio State University; Princeton University; University of Puerto Rico; University of Puerto Rico Mayaguez; Purdue University System; Purdue University; Purdue University West Lafayette Campus; Rice University; University of Rochester; Rutgers State University New Brunswick; University of Tennessee System; University of Tennessee Knoxville; Texas A&M University System; Texas A&M University College Station; Texas Tech University System; Texas Tech University; Vanderbilt University; University of Virginia; Wayne State University; University of Wisconsin System; University of Wisconsin Madison; Technische Universitat Wien; Arab Academy for Science, Technology & Maritime Transport; Universidade Estadual de Campinas; Universidade Federal do Rio Grande do Sul; Universidade Federal de Mato Grosso do Sul; Universidade Federal de Pelotas; Nanjing Normal University; University of Chinese Academy of Sciences, CAS; Cairo University; Suez University; British University in Egypt; Zewail City of Science & Technology; Universite de Haute-Alsace (UHA); Erzincan Binali Yildirim University; Brandenburg University of Technology Cottbus; Assiut University; Indian Institute of Technology (IIT) - Bhubaneswar; Institute of Physics Bhubaneswar (IOPB); Shoolini University; University of Hyderabad; Visva Bharati University; Indian Institute of Technology (IIT) - Bombay; Sharif University of Technology; University of Science & Technology of Mazandaran; Italian National Agency New Technical Energy & Sustainable Economics Development; Academy of Sciences of Uzbekistan; Peter the Great St. Petersburg Polytechnic University; Budker Institute of Nuclear Physics; Eastern University, Sri Lanka; Ecole Polytechnique Federale de Lausanne; Universite de Savoie; Sirnak University; Near East University; Beykent University; Istanbul Aydin University; Mersin University; Piri Reis University; Adiyaman University; Ozyegin University; Izmir Institute of Technology; Necmettin Erbakan University; Bozok University; Marmara University; Kafkas University; Istanbul Bilgi University; Hacettepe University; University of Southampton; Monash University; Karamanoglu Mehmetbey University; Ain Shams University; Mimar Sinan Guzel Sanatlar University; Qatar Foundation (QF); Texas A&M University Qatar
    The rate for Higgs ( \(H\) ) bosons production in association with either one ( \(tH\) ) or two ( \(t\overline{t}H\) ) top quarks is measured in final states containing multiple electrons, muons, or tau leptons decaying to hadrons and a neutrino, using proton–proton collisions recorded at a center-of-mass energy of \(13\phantom{\rule{0.166667em}{0ex}}\text{TeV}\) by the CMS experiment. The analyzed data correspond to an integrated luminosity of 137 \(\phantom{\rule{0.166667em}{0ex}}{\text{fb}}^{-1}\). The analysis is aimed at events that contain \(H\to WW\), \(H\to \tau \tau \), or \(H\to ZZ\) decays and each of the top quark(s) decays either to lepton+jets or all-jet channels. Sensitivity to signal is maximized by including ten signatures in the analysis, depending on the lepton multiplicity. The separation among \(tH\), \(t\overline{t}H\), and the backgrounds is enhanced through machine-learning techniques and matrix-element methods. The measured production rates for the \(t\overline{t}H\) and \(tH\) signals correspond to \(0.92±0.19\phantom{\rule{0.166667em}{0ex}}{\text{(stat)}}_{-0.13}^{+0.17}\phantom{\rule{0.166667em}{0ex}}\text{(syst)}\) and \(5.7±2.7\phantom{\rule{0.166667em}{0ex}}\text{(stat)}±3.0\phantom{\rule{0.166667em}{0ex}}\text{(syst)}\) of their respective standard model (SM) expectations. The corresponding observed (expected) significance amounts to 4.7 (5.2) standard deviations for \(t\overline{t}H\), and to 1.4 (0.3) for \(tH\) production. Assuming that the Higgs boson coupling to the tau lepton is equal in strength to its expectation in the SM, the coupling \({y}_{t}\) of the Higgs boson to the top quark divided by its SM expectation, \({\kappa }_{t}={y}_{t}/{y}_{t}^{\mathrm{SM}}\), is constrained to be within \(-0.9<{\kappa }_{t}<-0.7\) or \(0.7<{\kappa }_{t}<1.1\), at 95% confidence level. This result is the most sensitive measurement of the \(t\overline{t}H\) production rate to date.
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    Measurement of the inclusive and differential Higgs boson production cross sections in the leptonic WW decay mode at √s = 13 TeV
    (2021) CMS Collaboration; Buccilli, A.; Cooper, S.I.; Gleyzer, S.V.; Henderson, C.; Rumerio, P.; West, C.; University of Alabama Tuscaloosa
    Measurements of the fiducial inclusive and differential production cross sections of the Higgs boson in proton-proton collisions at \(\sqrt{s}\) = 13 TeV are performed using events where the Higgs boson decays into a pair of W bosons that subsequently decay into a final state with an electron, a muon, and a pair of neutrinos. The analysis is based on data collected with the CMS detector at the LHC during 2016–2018, corresponding to an integrated luminosity of 137 fb⁻¹. Production cross sections are measured as a function of the transverse momentum of the Higgs boson and the associated jet multiplicity. The Higgs boson signal is extracted and simultaneously unfolded to correct for selection efficiency and resolution effects using maximum-likelihood fits to the observed distributions in data. The integrated fiducial cross section is measured to be 86.5 ± 9.5 fb, consistent with the Standard Model expectation of 82.5 ± 4.2 fb. No significant deviation from the Standard Model expectations is observed in the differential measurements.
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    Measurement of the top quark Yukawa coupling from t(t)over-bar kinematic distributions in the dilepton final state in proton-proton collisions at root s=13 TeV
    (American Physical Society, 2020) CMS Collaboration; Buccilli, A.; Charaf, O.; Cooper, S.I.; Gleyzer, S.V.; Henderson, C.; Rumerio, P.; West, C.; Yerevan Physics Institute; Belarusian State University; University of Antwerp; Vrije Universiteit Brussel; Universite Libre de Bruxelles; Ghent University; Universite Catholique Louvain; Centro Brasileiro de Pesquisas Fisicas; Universidade do Estado do Rio de Janeiro; Universidade Estadual Paulista; Universidade Federal do ABC (UFABC); Bulgarian Academy of Sciences; University of Sofia; Beihang University; Tsinghua University; Chinese Academy of Sciences; Institute of High Energy Physics, CAS; Peking University; Sun Yat Sen University; Zhejiang University; Universidad de los Andes (Colombia); Universidad de Antioquia; University of Split; Rudjer Boskovic Institute; University of Cyprus; Charles University Prague; Escuela Politecnica Nacional Ecuador; Egyptian Academy of Scientific Research & Technology (ASRT); Egyptian Knowledge Bank (EKB); Egyptian Network of High Energy Physics (ENHEP); Fayoum University; National Institute of Chemical Physics & Biophysics (NICPB); University of Helsinki; Helsinki Institute of Physics; Lappeenranta University of Technology; CEA; UDICE-French Research Universities; Universite Paris Saclay; Centre National de la Recherche Scientifique (CNRS); CNRS - National Institute of Nuclear and Particle Physics (IN2P3); Universites de Strasbourg Etablissements Associes; Universite de Strasbourg; Universite Claude Bernard Lyon 1; Georgian Technical University; Ivane Javakhishvili Tbilisi State University; RWTH Aachen University; Helmholtz Association; Deutsches Elektronen-Synchrotron (DESY); University of Hamburg; Karlsruhe Institute of Technology; National Centre of Scientific Research "Demokritos"; National & Kapodistrian University of Athens; National Technical University of Athens; University of Ioannina; Eotvos Lorand University; Eotvos Lorand Research Network; Hungarian Academy of Sciences; Hungarian Wigner Research Centre for Physics; Hungarian Institute for Nuclear Research; University of Debrecen; Eszterhazy Karoly Catholic University; Indian Institute of Science (IISC) - Bangalore; Homi Bhabha National Institute; National Institute of Science Education & Research (NISER); Panjab University; University of Delhi; Saha Institute of Nuclear Physics; Indian Institute of Technology System (IIT System); Indian Institute of Technology (IIT) - Madras; Bhabha Atomic Research Center (BARC); Tata Institute of Fundamental Research (TIFR); Indian Institute of Science Education & Research (IISER) Pune; Isfahan University of Technology; University College Dublin; Istituto Nazionale di Fisica Nucleare (INFN); Universita degli Studi di Bari Aldo Moro; Politecnico di Bari; University of Bologna; University of Catania; University of Florence; University of Genoa; University of Milano-Bicocca; University of Naples Federico II; University of Basilicata; Guglielmo Marconi University; University of Padua; University of Trento; University of Pavia; University of Perugia; University of Pisa; Scuola Normale Superiore di Pisa; Sapienza University Rome; University of Turin; University of Eastern Piedmont Amedeo Avogadro; University of Trieste; Kyungpook National University; Chonnam National University; Hanyang University; Korea University; Kyung Hee University; Sejong University; Seoul National University (SNU); University of Seoul; Yonsei University; Sungkyunkwan University (SKKU); Riga Technical University; Vilnius University; Universiti Malaya; Universidad de Sonora; CINVESTAV - Centro de Investigacion y de Estudios Avanzados del Instituto Politecnico Nacional; Instituto Politecnico Nacional - Mexico; Universidad Iberoamericana Ciudad de Mexico; Benemerita Universidad Autonoma de Puebla; Universidad Autonoma de San Luis Potosi; University of Montenegro; University of Auckland; University of Canterbury; National Centre for Physics - Pakistan; Quaid I Azam University; AGH University of Science & Technology; National Centre for Nuclear Research; University of Warsaw; Laboratorio de Instrumentacao e Fisica Experimental de Particulas; Joint Institute for Nuclear Research - Russia; National Research Centre - Kurchatov Institute; Petersburg Nuclear Physics Institute; Russian Academy of Sciences; Institute for Nuclear Research of the Russian Academy of Sciences; Alikhanov Institute for Theoretical & Experimental Physics; Moscow Institute of Physics & Technology; National Research Nuclear University MEPhI (Moscow Engineering Physics Institute); Russian Academy of Science Lebedev Physical Institute; Lomonosov Moscow State University; Institute of High Energy Physics - IHEP; Tomsk Polytechnic University; Tomsk State University; University of Belgrade; Centro de Investigaciones Energeticas, Medioambientales Tecnologicas; Autonomous University of Madrid; University of Oviedo; Consejo Superior de Investigaciones Cientificas (CSIC); Universidad de Cantabria; CSIC - Instituto de Fisica de Cantabria (IFCA); University of Colombo; University Ruhuna; European Organization for Nuclear Research (CERN); Swiss Federal Institutes of Technology Domain; Paul Scherrer Institute; ETH Zurich; University of Zurich; National Central University; National Taiwan University; Chulalongkorn University; Cukurova University; Middle East Technical University; Bogazici University; Istanbul Technical University; Istanbul University; National Academy of Sciences Ukraine; Institute for Scintillation Materials of the National Academy of Sciences of Ukraine; Kharkov Institute of Physics & Technology; University of Bristol; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC); STFC Rutherford Appleton Laboratory; Imperial College London; Brunel University; Baylor University; Catholic University of America; University of Alabama Tuscaloosa; Boston University; Brown University; University of California System; University of California Davis; University of California Los Angeles; University of California Riverside; University of California San Diego; University of California Santa Barbara; California Institute of Technology; Carnegie Mellon University; University of Colorado System; University of Colorado Boulder; Cornell University; United States Department of Energy (DOE); University of Chicago; Fermi National Accelerator Laboratory; State University System of Florida; University of Florida; Florida International University; Florida State University; Florida Institute of Technology; University of Illinois System; University of Illinois Chicago; University of Illinois Chicago Hospital; University of Iowa; Johns Hopkins University; University of Kansas; Kansas State University; Lawrence Livermore National Laboratory; University System of Maryland; University of Maryland College Park; Massachusetts Institute of Technology (MIT); University of Minnesota System; University of Minnesota Twin Cities; University of Mississippi; University of Nebraska System; University of Nebraska Lincoln; State University of New York (SUNY) System; State University of New York (SUNY) Buffalo; Northeastern University; Northwestern University; University of Notre Dame; University System of Ohio; Ohio State University; Princeton University; University of Puerto Rico; University of Puerto Rico Mayaguez; Rice University; University of Rochester; Rutgers State University New Brunswick; University of Tennessee System; University of Tennessee Knoxville; Texas A&M University System; Texas A&M University College Station; Texas Tech University System; Texas Tech University; Vanderbilt University; University of Virginia; Wayne State University; University of Wisconsin System; University of Wisconsin Madison; Technische Universitat Wien; Universidade Estadual de Campinas; Universidade Federal do Rio Grande do Sul; Universidade Federal de Mato Grosso do Sul; Universidade Federal de Pelotas; University of Chinese Academy of Sciences, CAS; British University in Egypt; Ain Shams University; Purdue University System; Purdue University; Purdue University West Lafayette Campus; Universite de Haute-Alsace (UHA); Erzincan Binali Yildirim University; Brandenburg University of Technology Cottbus; Assiut University; Indian Institute of Technology (IIT) - Bhubaneswar; Institute of Physics Bhubaneswar (IOPB); Shoolini University; University of Hyderabad; Visva Bharati University; Italian National Agency New Technical Energy & Sustainable Economics Development; Warsaw University of Technology; Peter the Great St. Petersburg Polytechnic University; Budker Institute of Nuclear Physics; University of Siena; Eastern University, Sri Lanka; Sirnak University; Near East University; Beykent University; Istanbul Aydin University; Mersin University; Piri Reis University; Adiyaman University; Ozyegin University; Izmir Institute of Technology; Bozok University; Marmara University; Kafkas University; Istanbul Bilgi University; Hacettepe University; Durham University; Monash University; Karamanoglu Mehmetbey University; Bingol University; Sinop University; Mimar Sinan Guzel Sanatlar University; Nanjing Normal University; Qatar Foundation (QF); Texas A&M University Qatar; University of Science & Technology of Mazandaran
    A measurement of the Higgs boson Yukawa coupling to the top quark is presented using proton-proton collision data at \(\sqrt{s}=13\text{}\text{}\mathrm{TeV}\), corresponding to an integrated luminosity of \(137\text{}\text{}{\mathrm{fb}}^{-1}\), recorded with the CMS detector. The coupling strength with respect to the standard model value, \({Y}_{t}\), is determined from kinematic distributions in \(t\overline{t}\) final states containing \(ee\), \(\mu \mu \), or \(e\mu \) pairs. Variations of the Yukawa coupling strength lead to modified distributions for \(t\overline{t}\) production. In particular, the distributions of the mass of the \(t\overline{t}\) system and the rapidity difference of the top quark and antiquark are sensitive to the value of \({Y}_{t}\). The measurement yields a best fit value of \({{Y}_{t}=1.16}_{-0.35}^{+0.24}\), bounding \({Y}_{t}<1.54\) at a 95% confidence level.