Measurement of the mass difference between top and anti-top quarks in pp collisions at √s = 7 TeV using the ATLAS detector
Author(s)Taylor, Frank E.
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A measurement of the mass difference between top and anti-top quarks is presented. In a 4.7 fb[superscript −1] data sample of proton–proton collisions at √s = 7 TeV recorded with the ATLAS detector at the LHC, events consistent with t[¯ over t] 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 ≡ m[subscript t] − m[subscript ¯ over t] = 0.67 ± 0.61 (stat) ± 0.41 (syst) GeV, consistent with CPT invariance.
DepartmentMassachusetts Institute of Technology. Department of Physics
Physics Letters B
Aad, G. et al. “Measurement of the Mass Difference Between Top and Anti-Top Quarks in Pp Collisions at √s = 7 TeV Using the ATLAS Detector.” Physics Letters B 728 (January 2014): 363–379.
Final published version