Measurement of the top quark Yukawa coupling from t(t)over-bar kinematic distributions in the lepton plus jets final state in proton-proton collisions at root s=13 TeV

dc.contributor.authorCMS Collaboration
dc.contributor.authorBuccilli, A.
dc.contributor.authorCooper, S.I.
dc.contributor.authorHenderson, C.
dc.contributor.authorRumerio, P.
dc.contributor.authorWest, C.
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dc.date.accessioned2022-08-02T15:21:20Z
dc.date.available2022-08-02T15:21:20Z
dc.date.issued2019
dc.description.abstractResults are presented for an extraction of the top quark Yukawa coupling from top quark-antiquark \(t\overline{t}\) kinematic distributions in the lepton plus jets final state in proton-proton collisions, based on data collected by the CMS experiment at the LHC at \(\sqrt{s}=13\text{}\text{}\mathrm{TeV}\), corresponding to an integrated luminosity of \(35.8\text{}\text{}{\mathrm{fb}}^{-1}\). Corrections from weak boson exchange, including Higgs bosons, between the top quarks can produce large distortions of differential distributions near the energy threshold of \(t\overline{t}\) production. Therefore, precise measurements of these distributions are sensitive to the Yukawa coupling. Top quark events are reconstructed with at least three jets in the final state, and a novel technique is introduced to reconstruct the \(t\overline{t}\) system for events with one missing jet. This technique enhances the experimental sensitivity in the low invariant mass region, \({M}_{t\overline{t}}\). The data yields in \({M}_{t\overline{t}}\), the rapidity difference \(|{y}_{t}-{y}_{\overline{t}}|\), and the number of reconstructed jets are compared with distributions representing different Yukawa couplings. These comparisons are used to measure the ratio of the top quark Yukawa coupling to its standard model predicted value to be \({1.07}_{-0.43}^{+0.34}\) with an upper limit of 1.67 at the 95% confidence level.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.citationSirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Brandstetter, J., Dragicevic, M., Erö, J., Escalante Del Valle, A., Flechl, M., Frühwirth, R., Jeitler, M., Krammer, N., Krätschmer, I., Liko, D., Madlener, T., Mikulec, I., Rad, N., … Schieck, J. (2019). Measurement of the top quark Yukawa coupling from tt¯ kinematic distributions in the lepton+jets final state in proton-proton collisions at s=13  TeV. In Physical Review D (Vol. 100, Issue 7). American Physical Society (APS). https://doi.org/10.1103/physrevd.100.072007
dc.identifier.doi10.1103/PhysRevD.100.072007
dc.identifier.urihttps://ir.ua.edu/handle/123456789/9202
dc.languageEnglish
dc.language.isoen_US
dc.publisherAmerican Physical Society
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectPAIR
dc.subjectTHRESHOLD
dc.subjectAstronomy & Astrophysics
dc.subjectPhysics, Particles & Fields
dc.subjectPhysics
dc.titleMeasurement of the top quark Yukawa coupling from t(t)over-bar kinematic distributions in the lepton plus jets final state in proton-proton collisions at root s=13 TeVen_US
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dc.typeArticle
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