Measurements of jet observables sensitive to b-quark fragmentation in tt events at the LHC with the ATLAS detector

• Titel: Measurements of jet observables sensitive to b-quark fragmentation in tt events at the LHC with the ATLAS detector
• 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: Krishnan, Anjali [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: Stamen, Rainer [VerfasserIn]
• Mitwirkende: Starovoitov, Pavel [VerfasserIn]
• Mitwirkende: Vigani, Luigi [VerfasserIn]
• Mitwirkende: Weber, Sebastian [VerfasserIn]
• Mitwirkende: Wessels, Martin [VerfasserIn]
• Mitwirkende: Yue, Xiaoguang [VerfasserIn]
• Körperschaft: ATLAS Collaboration [VerfasserIn]
• Verf.angabe: G. Aad et al. (ATLAS Collaboration)
• E-Jahr: 2022
• Jahr: 9 August 2022
• Umfang: 33 S.
• Illustrationen: Diagramme
• Fussnoten: Im Titel erscheint der Begriff "tt" mit einem Querstrich ; ATLAS Collaboration: G. Aad, L.M. Baltes, F. Bartels, F.L. Castillo, M.M. Czurylo, S.J. Dittmeier, M. Dunford, S. Franchino, M. Klassen, A. Krishnan, T. Mkrtchyan, F. Napolitano, 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, X. Yue, J. Zinsser [und viele weitere] ; Gesehen am 07.11.2023
• Titel Quelle: Enthalten in: Physical review
• Ort Quelle: Ridge, NY : American Physical Society, 2016
• Jahr Quelle: 2022
• Band/Heft Quelle: 106(2022), 3, Artikel-ID 032008, Seite 1-33
• ISSN Quelle: 2470-0029
• DOI: doi:10.1103/PhysRevD.106.032008
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1831030845

Abstract

Several observables sensitive to the fragmentation of b quarks into b hadrons are measured using 36 fb−1 of √s=13 TeV proton-proton collision data collected with the ATLAS detector at the LHC. Jets containing b hadrons are obtained from a sample of dileptonic t¯t events, and the associated set of charged-particle tracks is separated into those from the primary pp interaction vertex and those from the displaced b-decay secondary vertex. This division is used to construct observables that characterize the longitudinal and transverse momentum distributions of the b hadron within the jet. The measurements have been corrected for detector effects and provide a test of heavy-quark-fragmentation modeling at the LHC in a system where the top-quark decay products are color connected to the proton beam remnants. The unfolded distributions are compared with the predictions of several modern Monte Carlo parton-shower generators and generator tunes, and a wide range of agreement with the data is observed, with p values varying from 5×10−4 to 0.98. These measurements complement similar measurements from e+e− collider experiments in which the b quarks originate from a color singlet Z/γ∗.