Direct measurement of the mass difference between top and antitop quarks

Collaboration, D0 and Bertram, Iain and Borissov, Guennadi and Fox, Harald and Ross, Anthony and Williams, Mark and Ratoff, Peter (2011) Direct measurement of the mass difference between top and antitop quarks. Physical Review D, 84 (5). ISSN 1550-7998

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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.

Item Type:
Journal Article
Journal or Publication Title:
Physical Review D
Additional Information:
© 2011 American Physical Society submitted to Phys. Rev. D
ID Code:
63664
Deposited By:
Deposited On:
24 Apr 2013 09:56
Refereed?:
Yes
Published?:
Published
Last Modified:
03 Dec 2020 01:43