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Article Dans Une Revue Journal of High Energy Physics Année : 2012

Measurement of the mass difference between top and antitop quarks

S. Chatrchyan
  • Fonction : Auteur
Pierre Busson
R. Granier de Cassagnac
C. Mironov
P. Paganini
J.-L. Agram
C. Collard
E. Conte
P. van Hove
S. Beauceron
  • Fonction : Auteur
CMS
D. Contardo
M. Gouzevitch
M. Lethuillier
V. Sordini
P. Verdier

Résumé

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.

Dates et versions

in2p3-00687362 , version 1 (13-04-2012)

Identifiants

Citer

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, 2012, 6, pp.109. ⟨10.1007/JHEP06(2012)109⟩. ⟨in2p3-00687362⟩
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