Skip to Main content Skip to Navigation
Journal articles

Measurement of the mass difference between top and antitop quarks

Abstract : A measurement of the mass difference between the top and the antitop quark (Delta m(t) = m(t) - m(anti-t)) is performed using events with a muon or an electron and at least four jets in the final state. The analysis is based on data collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 4.96 +/- 0.11 inverse femtobarns, and yields the value of Delta m(t) = -0.44 +/- 0.46 (stat) +/- 0.27 (syst) GeV. This result is consistent with equality of particle and antiparticle masses required by CPT invariance, and provides a significantly improved precision relative to existing measurements.
Document type :
Journal articles
Complete list of metadata
Contributor : Sylvie Flores <>
Submitted on : Friday, April 13, 2012 - 7:58:41 AM
Last modification on : Friday, September 17, 2021 - 2:28:04 PM

Links full text



S. Chatrchyan, M. Besancon, S. Choudhury, M. Dejardin, D. Denegri, et al.. Measurement of the mass difference between top and antitop quarks. Journal of High Energy Physics, Springer, 2012, 6, pp.109. ⟨10.1007/JHEP06(2012)109⟩. ⟨in2p3-00687362⟩



Record views