@Article{LHCbCollaborationAaij_etal2015,
author="LHCb Collaboration (Aaij, R. et al
and Martinez-Vidal, F.
and Oyanguren, A.
and Ruiz Valls, P.
and Sanchez Mayordomo, C.",
title="Precision Measurement of CP Violation in B-S(0) -> J/Psi K+K- Decays",
journal="Physical Review Letters",
year="2015",
publisher="Amer Physical Soc",
volume="114",
number="4",
pages="041801--9pp",
abstract="The time-dependent CP asymmetry in B-S(0) -> J/Psi K+K- decays is measured using pp collision data, corresponding to an integrated luminosity of 3.0 fb(-1), collected with the LHCb detector at center-of-mass energies of 7 and 8 TeV. In a sample of 96 000 B-S(0) -> J/Psi K+K- decays, the CP-violating phase phi(s) is measured, as well as the decay widths GL and GH of the light and heavy mass eigenstates of the B-s(0)-(B) over bar (0)(s) system. The values obtained are phi(s) = -0.058 +/- 0.049 +/- 0.006 rad, Gamma(s) equivalent to (Gamma(L) + Gamma(H))/2 = 0.6603 +/- 0.0027 +/- 0.0015 ps(-1), and Delta Gamma(s) equivalent to Gamma(L)-Gamma(H) = 0.0805 +/- 0.0091 +/- 0.0032 ps(-1), where the first uncertainty is statistical and the second, systematic. These are the most precise single measurements of those quantities to date. A combined analysis with B-s(0) -> J/Psi pi(+)pi(-) decays gives phi(s) = -0.010 +/- 0.039 rad. All measurements are in agreement with the standard model predictions. For the first time, the phase phi(s) is measured independently for each polarization state of the K+K- system and shows no evidence for polarization dependence.",
optnote="WOS:000351270800002",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2170), last updated on Thu, 16 Apr 2015 10:51:21 +0000",
issn="0031-9007",
doi="10.1103/PhysRevLett.114.041801",
opturl="http://arxiv.org/abs/1411.3104",
opturl="https://doi.org/10.1103/PhysRevLett.114.041801",
archivePrefix="arXiv",
eprint="1411.3104",
language="English"
}