Direct measurement of the mass difference between top and antitop quarks
High Energy Physics - Experiment
2012-08-27 v2
Abstract
We present a direct measurement of the mass difference between top and antitop quarks (dm) in lepton+jets top-antitop final states using the "matrix element" method. The purity of the lepton+jets sample is enhanced for top-antitop events by identifying at least one of the jet as originating from a b quark. The analyzed data correspond to 3.6 fb-1 of proton-antiproton collisions at 1.96 TeV acquired by D0 in Run II of the Fermilab Tevatron Collider. The combination of the e+jets and mu+jets channels yields dm = 0.8 +/- 1.8 (stat) +/- 0.5 (syst) GeV, which is in agreement with the standard model expectation of no mass difference.
Cite
@article{arxiv.1106.2063,
title = {Direct measurement of the mass difference between top and antitop quarks},
author = {D0 Collaboration},
journal= {arXiv preprint arXiv:1106.2063},
year = {2012}
}
Comments
submitted to Phys. Rev. D