Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/88277
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Type: Journal article
Title: Measurement of the mass difference between top and anti-top quarks in pp collisions at √(s) = 7 TeV using the ATLAS detector
Other Titles: Measurement of the mass difference between top and anti-top quarks in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector
Author: ATLAS Collaboration
Citation: Physics Letters B: Nuclear Physics and Particle Physics, 2014; 728(1):363-379
Publisher: Elsevier Science BV
Issue Date: 2014
ISSN: 0370-2693
1873-2445
Statement of
Responsibility: 
ATLAS Collaboration (members listed at the end of the article)
Abstract: 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.
Rights: © 2013 The Authors. Published by Elsevier B.V. Open access under CC BY license
DOI: 10.1016/j.physletb.2013.12.010
Published version: http://dx.doi.org/10.1016/j.physletb.2013.12.010
Appears in Collections:Aurora harvest 7
Physics publications

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