Measurements of jet observables sensitive to b-quark fragmentation in [tau][tau][over-bar] events at the LHC with the ATLAS detector

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∗

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch
• Notes: Physical review. D : covering particles, fields, gravitation, and cosmology. - 106, 3 (2022) , 032008, ISSN: 2470-0029

Contributors, Places and Time

• Event: Veröffentlichung
• (where): Freiburg
• (who): Universität
• (when): 2023
• Creator: ATLAS Collaboration CERN, [Study Group] ; Argyropoulos, Spyridon ; Becherer, Fabian ; García-Argos, Carlos ; Gargiulo, Simona ; Guth, Manuel ; Heidegger, Constantin ; Heidegger, Kim K. ; Heinemann, Beate ; Herten, Gregor ; Hohn, David ; Hönig, Jan Cedric ; Jakobs, Karl ; Jenni, Peter ; Jiggins, Stephen ; Klapdor-Kleingrothaus, Thorwald ; Knue, Andrea ; Köneke, Karsten ; Kuprash, Oleg ; Landgraf, Ulrich ; Lang, Valerie ; Lösle, Alena ; Magerl, Veronika ; Parzefall, Ulrich ; Plesanovs, Vladislavs ; Rodríguez Rodríguez, Arturo ; Roland, Benoit ; Rottler, Benjamin ; Rühr, Frederik ; Rúriková, Zuzana ; Sammel, Dirk ; Sauerburger, Frank ; Schleicher, Katharina E. ; Scholer, Patrick ; Schumacher, Markus ; Sperlich, Dennis ; Weiser, Christian ; Wiik-Fuchs, Liv ; Winter, Benedict T. ; Wollrath, Julian ; Zanzi, Daniele ; Zimmermann, Stephanie ; et al
• Contributor: Experimentelle Teilchenphysik, Abt. Prof. Heinemann ; Experimentelle Teilchenphysik, Abt. Prof. Dr. Gregor Herten ; Experimentelle Teilchenphysik, Abt. Prof. Karl Jakobs ; Experimentelle Teilchenphysik, Abt. Prof. Schumacher

Further information

• DOI: 10.1103/physrevd.106.032008
• URN: urn:nbn:de:bsz:25-freidok-2338045
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 14.08.2025, 10:47 AM CEST