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Title: Combinations of single-top-quark production cross-section measurements and |fLVVtb| determinationsat√s = 7and8TeVwiththe ATLASandCMSexperiments
Authors: Aaboud, M
Aad, G
Abbott, B
Abbott, DC
Abdinov, O
Abed Abud, A
Abhayasinghe, DK
Abidi, SH
AbouZeid, OS
Abraham, NL
Abramowicz, H
Abreu, H
Abulaiti, Y
Acharya, BS
Adachi, S
Adam, L
Adamczyk, L
Adamek, L
Adelman, J
Adersberger, M
Adiguzel, A
Adorni, S
Adye, T
Affolder, AA
Afik, Y
Agapopoulou, C
Agaras, MN
Aggarwal, A
Agheorghiesei, C
Aguilar-Saavedra, JA
Ahmadov, F
Ai, X
Aielli, G
Akatsuka, S
Åkesson, TPA
Akilli, E
Akimov, AV
Al Khoury, K
Alberghi, GL
Albert, J
Alconada Verzini, MJ
Alderweireldt, S
Aleksa, M
Aleksandrov, IN
Alexa, C
Alexandre, D
Alexopoulos, T
Alfonsi, A
Alhroob, M
Ali, B
Alimonti, G
Alison, J
Alkire, SP
Allaire, C
Allbrooke, BMM
Allen, BW
Allport, PP
Aloisio, A
Alonso, A
Alonso, F
Alpigiani, C
Alshehri, AA
Alstaty, MI
Alvarez Estevez, M
Alvarez Gonzalez, B
Álvarez Piqueras, D
Alviggi, MG
Amaral Coutinho, Y
Ambler, A
Ambroz, L
Amelung, C
Amidei, D
Amor Dos Santos, SP
Amoroso, S
Amrouche, CS
An, F
Anastopoulos, C
Andari, N
Andeen, T
Anders, CF
Anders, JK
Andreazza, A
Andrei, V
Anelli, CR
Angelidakis, S
Angelozzi, I
Angerami, A
Anisenkov, AV
Annovi, A
Antel, C
Anthony, MT
Antonelli, M
Antrim, DJA
Anulli, F
Aoki, M
Aparisi Pozo, JA
Aperio Bella, L
Arabidze, G
Araque, JP
Araujo Ferraz, V
Keywords: Hadron-Hadron scattering (experiments)
Issue Date: 16-May-2019
Publisher: springer
Citation: Journal of High Energy Physics, 2019, 2019 (5), pp. 1 - 80
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 s√s= 7 and 8 TeV corresponding to integrated luminosities of 1.17 to 5.1 fb−1 at s√s= 7 TeV and 12.2 to 20.3 fb−1 at 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 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 s√s= 7 and 8 TeV respectively. For the s-channel cross-section, the combination yields 4.9 ± 1.4 pb at s√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√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.
ISSN: 1126-6708
Appears in Collections:Dept of Electronic and Electrical Engineering Research Papers

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