Measurement of the CP-violating phase φsin B0s→J/ψπ+π−decays

Abstract

The mixing-induced CP-violating phase in and decays is measured using the 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 . This result is consistent with the Standard Model expectation and previous measurements.