Measurement of the CP violating phase Ï_s in Bs->J/Ïf0(980)
arXiv:1112.3056 · doi:10.1016/j.physletb.2012.01.017
Abstract
Measurement of mixing-induced CP violation in Bs decays is of prime importance in probing new physics. So far only the channel Bs->J/ÏÏ has been used. Here we report on a measurement using an LHCb data sample of 0.41/fb in the CP odd eigenstate JÏf0(980), where f0(980)->Ï+ Ï-. A time dependent fit of the data with the Bs lifetime and the difference in widths of the heavy and light eigenstates constrained to the values obtained from Bs-> J/ÏÏ yields a value of the CP violating phase of -0.44 +/- 0.44 +/- 0.02 rad, consistent with the Standard Model expectation.
15 pages 8 figures; 525 additional authors not shown. Final version with journal corrections. To be published in Phys. Lett. B