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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. |
URI: | http://bura.brunel.ac.uk/handle/2438/18428 |
DOI: | http://dx.doi.org/10.1007/JHEP05(2019)088 |
ISSN: | 1126-6708 http://dx.doi.org/10.1007/JHEP05(2019)088 |
Appears in Collections: | Dept of Electronic and Electrical Engineering Research Papers |
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