Combination of inclusive top-quark pair production cross-section measurements using ATLAS and CMS data at √s=7 and 8 TeV

• Titel: Combination of inclusive top-quark pair production cross-section measurements using ATLAS and CMS data at √s=7 and 8 TeV
• Mitwirkende: Aad, Georges [VerfasserIn]
• Mitwirkende: Bartels, Falk [VerfasserIn]
• Mitwirkende: Castillo, Florencia Luciana [VerfasserIn]
• Mitwirkende: Czurylo, Marta [VerfasserIn]
• Mitwirkende: Dittmeier, Sebastian [VerfasserIn]
• Mitwirkende: Dunford, Monica [VerfasserIn]
• Mitwirkende: Franchino, Silvia [VerfasserIn]
• Mitwirkende: Klassen, Martin [VerfasserIn]
• Mitwirkende: Mkrtchyan, Tigran [VerfasserIn]
• Mitwirkende: Ott, Philipp [VerfasserIn]
• Mitwirkende: Rassloff, Damir Fabrice [VerfasserIn]
• Mitwirkende: Rodriguez Bosca, Sergi [VerfasserIn]
• Mitwirkende: Sauer, Christof [VerfasserIn]
• Mitwirkende: Schöning, André [VerfasserIn]
• Mitwirkende: Schultz-Coulon, Hans-Christian [VerfasserIn]
• Mitwirkende: Spieker, Thomas [VerfasserIn]
• Mitwirkende: Stamen, Rainer [VerfasserIn]
• Mitwirkende: Starovoitov, Pavel [VerfasserIn]
• Mitwirkende: Vigani, Luigi [VerfasserIn]
• Mitwirkende: Weber, Sebastian [VerfasserIn]
• Mitwirkende: Wessels, Martin [VerfasserIn]
• Mitwirkende: Zinßer, Joachim [VerfasserIn]
• Körperschaft: ATLAS Collaboration [VerfasserIn]
• Körperschaft: CMS Collaboration [VerfasserIn]
• Verf.angabe: The ATLAS collaboration* and the CMS collaboration
• E-Jahr: 2023
• Jahr: 27 July 2023
• Umfang: 64 S.
• Illustrationen: Illustrationen
• Fussnoten: Veröffentlicht: 27. Juli 2023 ; Im Titel steht der Buchstabe s unter dem Wurzelsymbol ; *ATLAS collaboration: G. Aad, F. Bartels, F.L. Castillo, M.M. Czurylo, M. Dunford, S. Franchino, M. Klassen, T. Mkrtchyan, P.S. Ott, D.F. Rassloff, S. Rodriguez Bosca, C. Sauer, A. Schoening, H-C. Schultz-Coulon, T.M. Spieker, R. Stamen, P. Starovoitov, L. Vigani, S.M. Weber, M. Wessels, J. Zinsser [und sehr viele weitere Personen] ; Gesehen am 17.05.2024
• Titel Quelle: Enthalten in: Journal of high energy physics
• Ort Quelle: Berlin : Springer, 1997
• Jahr Quelle: 2023
• Band/Heft Quelle: (2023), 7, Artikel-ID 213, Seite 1-64
• ISSN Quelle: 1029-8479
• DOI: doi:10.1007/JHEP07(2023)213
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Hadron-Hadron Scattering
• Sach-SW: Top Physics
• K10plus-PPN: 1889093726

Abstract

A combination of measurements of the inclusive top-quark pair production cross-section performed by ATLAS and CMS in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV at the LHC is presented. The cross-sections are obtained using top-quark pair decays with an opposite-charge electron-muon pair in the final state and with data corresponding to an integrated luminosity of about 5 fb−1 at √s = 7 TeV and about 20 fb−1 at √s = 8 TeV for each experiment. The combined cross-sections are determined to be 178.5 ± 4.7 pb at √s = 7 TeV and $$ {243.3}_{-5.9}^{+6.0} $$pb at √s = 8 TeV with a correlation of 0.41, using a reference top-quark mass value of 172.5 GeV. The ratio of the combined cross-sections is determined to be R8/7 = 1.363 ± 0.032. The combined measured cross-sections and their ratio agree well with theory calculations using several parton distribution function (PDF) sets. The values of the top-quark pole mass (with the strong coupling fixed at 0.118) and the strong coupling (with the top-quark pole mass fixed at 172.5 GeV) are extracted from the combined results by fitting a next-to-next-to-leading-order plus next-to-next-to-leading-log QCD prediction to the measurements. Using a version of the NNPDF3.1 PDF set containing no top-quark measurements, the results obtained are {m}_t^{\textrm{pole}}={173.4}_{-2.0}^{+1.8} $$GeV and $$ {\alpha}_{\textrm{s}}\left({m}_Z\right)={0.1170}_{-0.0018}^{+0.0021}.