First measurement of time-dependent CP violation in Bs -> K+K- decays - IN2P3 - Institut national de physique nucléaire et de physique des particules
Journal Articles Journal of High Energy Physics Year : 2013

First measurement of time-dependent CP violation in Bs -> K+K- decays

R. Aaij
  • Function : Author
J. He
J. Cogan
O. Leroy
J. Serrano

Abstract

Direct and mixing-induced CP-violating asymmetries in Bs -> K+K- decays are measured for the first time using a data sample of pp collisions, corresponding to an integrated luminosity of 1.0 fb^{-1}, collected with the LHCb detector at a centre-of-mass energy of 7 TeV. The results are C_{KK} = 0.14 \pm 0.11 \pm 0.03 and S_{KK} = 0.30 \pm 0.12 \pm 0.04, where the first uncertainties are statistical and the second systematic. The corresponding quantities are also determined for B0 -> pi+pi- decays to be C_{pipi} = -0.38 \pm 0.15 \pm 0.02 and S_{pipi} = -0.71 \pm 0.13 \pm 0.02, in good agreement with existing measurements.

Dates and versions

in2p3-00850723 , version 1 (08-08-2013)

Identifiers

Cite

R. Aaij, Y. Amhis, S. Barsuk, O. Callot, J. He, et al.. First measurement of time-dependent CP violation in Bs -> K+K- decays. Journal of High Energy Physics, 2013, 10, pp.183. ⟨10.1007/JHEP10(2013)183⟩. ⟨in2p3-00850723⟩
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