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Combinations of single-top-quark production cross-section measurements and |f LV Vtb| determinations at √s = 7 and 8 TeV with the ATLAS and CMS experiments

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2019
Aaboud2019_Article_CombinationsOFSingle-top-quark.pdf (1.125Mb)
Autori
Aaboud, M
Aad, G
Abbott, B
Abbott, D C
Adžić, Petar
Ćirković, Predrag
Devetak, Damir
Đorđević, Miloš
Milenović, Predrag
Milošević, Jovan
Ostala autorstva
ATLAS Collaboration
CMS Collaboration
ATLAS and CMS Collaboration (ukupan broj autora: 5309)
Članak u časopisu (Objavljena verzija)
,
© 2019, The Author(s)
Metapodaci
Prikaz svih podataka o dokumentu
Apstrakt
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 s = 7 and 8 TeV corresponding to integrated luminosities of 1.17 to 5.1 fb−1 at s = 7 TeV and 12.2 to 20.3 fb−1 at 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 s = 7 and 8 TeV respectively. The combined tW cross-sections are 16.3 ± 4.1 pb and 23.1 ± 3.6 pb at s = 7 and 8 TeV respectively. For the s-channel cross-section, the combination yields 4.9 ± 1.4 pb at s = 8 TeV. The square of the magnitude of the CKM matrix element Vtb multiplied by a form factor fLV 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 |Vtd|, |Vts| ≪ |Vtb|. All the |fLVVtb|2 determinations, extracted from individual ratios at s = 7 and 8 TeV, are combined, resulting in |fLVVtb| = 1.02 ± 0.04 (meas.) ± 0.02 (theo.). All combined measurements are consistent with their corresponding Standard Model predictions.[Figure not available: see fulltext.]. © 2019, The Author(s).

Izvor:
Journal of High Energy Physics, 2019, 2019, 5

DOI: 10.1007/JHEP05(2019)088

ISSN: 1126-6708

WoS: 000468428300001

Scopus: 2-s2.0-85066067505
[ Google Scholar ]
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URI
http://vinar.vin.bg.ac.rs/handle/123456789/8210
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Vinča

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