Measurement of the mass difference between top and anti-top quarks in pp collisions at root s=7 TeV using the ATLAS detector

Journal article

A measurement of the mass difference between top and anti-top quarks is presented. In a 4.7 fb1 data sample of proton-proton collisions at√s = 7 TeV recorded with the ATLAS detector at the LHC, events consistent with tt production and decay into a single charged lepton final state are reconstructed. For each event, the mass difference between the top and anti-top quark candidate is calculated. A two b-tag requirement is used in order to reduce the background contribution. A maximum likelihood fit to these per-event mass differences yields δm = mt - mt = 0.67 ± 0.61 (stat) ± 0.41 (syst) GeV, consistent with CPT invariance. © 2013 The Authors. Published by Elsevier B.V.

Authors: Aad, G; Abajyan, T; Abbott, B; Abdallah, J; Khalek, SA

• Publication status: Published
• Publisher: Elsevier
• Journal: Physics Letters B
• Volume: 728
• Issue: 1
• Pages: 363-379
• Publication date: 2014-01-20
• DOI: 10.1016/j.physletb.2013.12.010
• ISSN: 0370-2693
• Language: English