Measurement of the mass difference between top and anti-top quarks in pp collisions at √s=7 TeV using the ATLAS detector
A measurement of the mass difference between top and anti-top quarks is presented. In a 4.7 fb −1 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...
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| Formato: | JOUR |
| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_03702693_v728_n_p363_Aad |
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| Sumario: | A measurement of the mass difference between top and anti-top quarks is presented. In a 4.7 fb −1 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≡m t −m t¯ =0.67±0.61(stat)±0.41(syst) GeV, consistent with CPT invariance. © 2013 The Authors |
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