Measurement of the c-jet mistagging efficiency in tt[over-bar] events using pp collision data at [square root]s=13TeV collected with the ATLAS detector

Abstract: A technique is presented to measure the efficiency with which c-jets are mistagged as b-jets (mistagging efficiency) using tt¯
events, where one of the W bosons decays into an electron or muon and a neutrino and the other decays into a quark–antiquark pair. The measurement utilises the relatively large and known W→cs branching ratio, which allows a measurement to be made in an inclusive c-jet sample. The data sample used was collected by the ATLAS detector at s√=13 TeV and corresponds to an integrated luminosity of 139 fb−1. Events are reconstructed using a kinematic likelihood technique which selects the mapping between jets and tt¯
decay products that yields the highest likelihood value. The distribution of the b-tagging discriminant for jets from the hadronic W decays in data is compared with that in simulation to extract the mistagging efficiency as a function of jet transverse momentum. The total uncertainties are in the range 3–17%. The measurements generally agree with those in simulation but there are some differences in the region corresponding to the most stringent b-jet tagging requirement

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch
• Notes: The European physical journal. C, Particles and fields. - 82, 1 (2022) , 95, ISSN: 1434-6052

Contributors, Places and Time

• Event: Veröffentlichung
• (where): Freiburg
• (who): Universität
• (when): 2023
• Creator: ATLAS Collaboration CERN, [Study Group] ; Argyropoulos, Spyridon ; Becherer, Fabian ; Böhler, Michael ; Gargiulo, Simona ; Heidegger, Constantin ; Heidegger, Kim K. ; Heinemann, Beate ; Herten, Gregor ; Hohn, David ; Hönig, Jan Cedric ; Jakobs, Karl ; Jenni, Peter ; Klapdor-Kleingrothaus, Thorwald ; Knue, Andrea ; Köneke, Karsten ; Kuprash, Oleg ; Landgraf, Ulrich ; Lang, Valerie ; Lösle, Alena ; Magerl, Veronika ; Moskalets, Tetiana ; Parzefall, Ulrich ; Plesanovs, Vladislavs ; Rodriguez Rodriguez, Arturo ; Roland, Benoit ; Rottler, Benjamin ; Rühr, Frederik ; Rúriková, Zuzana ; Sammel, Dirk ; Sauerburger, Frank ; Schleicher, Katharina E. ; Scholer, Patrick ; Schumacher, Markus ; Solomon, Shalu ; Sperlich, Dennis ; Weiser, Christian ; Wiik-Fuchs, Liv ; Winter, Benedict T. ; Young, Christopher ; 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: 10.1140/epjc/s10052-021-09843-w
• URN: urn:nbn:de:bsz:25-freidok-2339582
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 25.03.2025, 1:51 PM CET