TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Oyanguren, A.
AU  - Ruiz Valls, P.
PY  - 2013
DA  - 2013//
TI  - First Measurement of the CP-Violating Phase in B-s(0) -> phi phi Decays
T2  - Phys. Rev. Lett.
JO  - Physical Review Letters
SP  - 241802
EP  - 8pp
VL  - 110
IS  - 24
PB  - Amer Physical Soc
AB  - A first flavor-tagged measurement of the time-dependent CP-violating asymmetry in B-s(0) -> phi phi decays is presented. In this decay channel, the CP-violating weak phase arises due to CP violation in the interference between B-s(0)-(B) over bar (0)(s) mixing and the b -> s (s) over bars gluonic penguin decay amplitude. Using a sample of pp collision data corresponding to an integrated luminosity of 1.0 fb(-1) and collected at a center-of-mass energy of 7 TeV with the LHCb detector, 880 B-s(0) -> phi phi signal decays are obtained. The CP-violating phase is measured to be in the interval [-2.46, -0.76] rad at a 68% confidence level. The p value of the standard model prediction is 16%.
SN  - 0031-9007
UR  - http://arxiv.org/abs/arXiv:1303.7125
UR  - https://doi.org/10.1103/PhysRevLett.110.241802
DO  - 10.1103/PhysRevLett.110.241802
LA  - English
N1  - WOS:000320307400005
ID  - LHCbCollaborationAaij_etal2013
ER  -