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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.;
Adelman, J.;
Adersberger, M.;
Adiguzel, A.;
Adorni, S.;
Adye, T.;
Affolder, A. A.;
[...]
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
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- Medientyp: E-Artikel
- Titel: 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
- Beteiligte: 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.; Adelman, J.; Adersberger, M.; Adiguzel, A.; Adorni, S.; Adye, T.; Affolder, A. A.; [...]
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Erschienen:
Springer Science and Business Media LLC, 2019
- Erschienen in: Journal of High Energy Physics, 2019 (2019) 5
- Sprache: Englisch
- DOI: 10.1007/jhep05(2019)088
- ISSN: 1029-8479
- Entstehung:
- Anmerkungen:
- Beschreibung: 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 $$ \sqrt{s} $$ s = 7 and 8 TeV corresponding to integrated luminosities of 1.17 to 5.1 fb−1 at $$ \sqrt{s} $$ s = 7 TeV and 12.2 to 20.3 fb−1 at $$ \sqrt{s} $$ s = 8 TeV. 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 $$ \sqrt{s} $$ s = 7 and 8 TeV respectively. The combined tW cross-sections are 16.3 ± 4.1 pb and 23.1 ± 3.6 pb at $$ \sqrt{s} $$ s = 7 and 8 TeV respectively. For the s-channel cross-section, the combination yields 4.9 ± 1.4 pb at $$ \sqrt{s} $$ s = 8 TeV. 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 $$ \sqrt{s} $$ 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.
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