Measurement of the mass difference between top and antitop quarks
Abstract
We present a measurement of the mass difference between top (t) and antitop (t¯) quarks using tt¯ candidate events reconstructed in the final state with one lepton and multiple jets. We use the full data set of Tevatron s=1.96TeV proton-antiproton collisions recorded by the CDF II detector, corresponding to an integrated luminosity of 8.7fb-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 ΔMtop=Mt-Mt¯=-1.95±1.11(stat)±0.59(syst)GeV/c2 and is in agreement with the standard model prediction of no mass difference.
- Publication:
-
Physical Review D
- Pub Date:
- March 2013
- DOI:
- arXiv:
- arXiv:1210.6131
- Bibcode:
- 2013PhRvD..87e2013A
- Keywords:
-
- 14.65.Ha;
- 13.85.Ni;
- 13.85.Qk;
- 12.15.Ff;
- Top quarks;
- Inclusive production with identified hadrons;
- Inclusive production with identified leptons photons or other nonhadronic particles;
- Quark and lepton masses and mixing;
- High Energy Physics - Experiment
- E-Print:
- Accepted in Phys. Rev. D