We present a measurement of the mass difference between top (t) and antitop ((t) over bar) quarks using t (t) over bar candidate events reconstructed in the final state with one lepton and multiple jets. We use the full data set of Tevatron root s = 1.96 TeV proton-antiproton collisions recorded by the CDF II detector, corresponding to an integrated luminosity of 8.7 fb(-1). We estimate event by event the mass difference to construct templates for top pair signal events and background events. The resulting mass difference distribution in data compared to signal and background templates using a likelihood fit yields Delta M-top = M-t - M-(t) over bar = -1.95 +/- 1.11(stat) +/- 0.59(syst) GeV/c(2) and is in agreement with the standard model prediction of no mass difference. DOI.10.1103/PhysRevD.87.052013

Measurement of the mass difference between top and antitop quarks

MORELLO, MICHAEL JOSEPH;
2013

Abstract

We present a measurement of the mass difference between top (t) and antitop ((t) over bar) quarks using t (t) over bar candidate events reconstructed in the final state with one lepton and multiple jets. We use the full data set of Tevatron root s = 1.96 TeV proton-antiproton collisions recorded by the CDF II detector, corresponding to an integrated luminosity of 8.7 fb(-1). We estimate event by event the mass difference to construct templates for top pair signal events and background events. The resulting mass difference distribution in data compared to signal and background templates using a likelihood fit yields Delta M-top = M-t - M-(t) over bar = -1.95 +/- 1.11(stat) +/- 0.59(syst) GeV/c(2) and is in agreement with the standard model prediction of no mass difference. DOI.10.1103/PhysRevD.87.052013
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11384/39039
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