Combinations of single-top-quark production cross-section measurements and |f_LV V_tb| determinations at √s = 7 and 8 TeV with the ATLAS and CMS experiments
| dc.contributor.author | CMS Collaboration | |
| dc.contributor.author | Buccilli, A. | |
| dc.contributor.author | Charaf, O. | |
| dc.contributor.author | Cooper, S.I. | |
| dc.contributor.author | Henderson, C. | |
| dc.contributor.author | Rumerio, P. | |
| dc.contributor.author | West, C. | |
| dc.contributor.other | University of Alabama Tuscaloosa | |
| dc.date.accessioned | 2022-08-02T15:11:21Z | |
| dc.date.available | 2022-08-02T15:11:21Z | |
| dc.date.issued | 2019 | |
| dc.description.abstract | This paper presents the combinations of single-top-quark production cross-section measurements by the ATLAS and CMS Collaborations, using data from LHC proton-proton collisions at \(\sqrt{s}\) = 7 and 8 TeV corresponding to integrated luminosities of 1.17 to 5.1 fb⁻¹ at \(\sqrt{s}\) = 7 TeV and 12.2 to 20.3 fb⁻¹ at \(\sqrt{s}\)=8TeV. These combinations are performed per centre-of-mass energy and for each production mode: \(t\)-channel, \(tW\), and \(s\)-channel. The combined \(t\)-channel cross-sections are 67.5 ± 5.7 pb and 87.7 ± 5.8 pb at \(\sqrt{s}\) = 7 and 8 TeV respectively. The combined \(tW\) cross-sections are 16.3 ± 4.1 pb and 23.1 ± 3.6 pb at \(\sqrt{s}\) = 7 and 8 TeV respectively. For the \(s\)-channel cross-section, the combination yields 4.9 ± 1.4 pb at \(\sqrt{s}\)=8TeV. The square of the magnitude of the CKM matrix element \(V_{tb}\) multiplied by a form factor f LV is determined for each production mode and centre-of-mass energy, using the ratio of the measured cross-section to its theoretical prediction. It is assumed that the top-quark-related CKM matrix elements obey the relation \(|V_{td}|,|V_{ts}| ≪ |V_{tb}|\). All the \(|f_{LV}V_{tb}|^2\) determinations, extracted from individual ratios at \(\sqrt{s}\) = 7 and 8 TeV, are combined, resulting in \(|f_{LV}V_{tb}|\) = 1.02 ± 0.04 (meas.) ± 0.02 (theo.). All combined measurements are consistent with their corresponding Standard Model predictions. | en_US |
| dc.format.mimetype | application/pdf | |
| dc.identifier.citation | Aaboud, M., Aad, G., Abbott, B., Abbott, D. C., Abdinov, O., Abed Abud, A., Abhayasinghe, D. K., Abidi, S. H., AbouZeid, O. S., Abraham, N. L., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B. S., Adachi, S., Adam, L., Adamczyk, L., … Adamek, L. (2019). Combinations of single-top-quark production cross-section measurements and |fLVVtb| determinations at $\sqrt{s}$ = 7 and 8 TeV with the ATLAS and CMS experiments. In Journal of High Energy Physics (Vol. 2019, Issue 5). Springer Science and Business Media LLC. https://doi.org/10.1007/jhep05(2019)088 | |
| dc.identifier.doi | 10.1007/JHEP05(2019)088 | |
| dc.identifier.uri | https://ir.ua.edu/handle/123456789/8653 | |
| dc.language | English | |
| dc.language.iso | en_US | |
| dc.rights.uri | https://creativecommons.org/licenses/by/3.0 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.subject | Hadron-Hadron scattering (experiments) | |
| dc.title | Combinations of single-top-quark production cross-section measurements and |f_LV V_tb| determinations at √s = 7 and 8 TeV with the ATLAS and CMS experiments | en_US |
| dc.type | text |
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