6533b7cffe1ef96bd125957d

RESEARCH PRODUCT

Measurement of the CP-violating phase phi(s) in (B)over-bar(s)(0) -> J / psi pi(+)pi(-) decays

Lhcb CollaborationFernando Martínez VidalArantza Oyanguren CamposPablo Ruiz VallsCarlos Sánchez Mayordomo

subject

High Energy Physics::PhenomenologyHigh Energy Physics::ExperimentFísica nuclear

description

The mixing-induced CP-violating phase phi(s) in B-s(0) and (B) over bar (0)(s) decays is measured using the J / psi pi(+)pi(-) final state in data, taken from 3 fb(-1) of integrated luminosity, collected with the LHCb detector in 7 and 8 TeV centre-of-mass pp collisions at the LHC. A time-dependent flavour-tagged amplitude analysis, allowing for direct CP violation, yields a value for the phase phi(s) = 70 +/- 68 +/- 8 mrad. This result is consistent with the Standard Model expectation and previous measurements.

yearjournalcountryeditionlanguage
2014-01-01
10.1016/j.physletb.2014.06.079http://hdl.handle.net/10550/52837