The mixing-induced CP-violating phase φs in Bs0 and B-s0 decays is measured using the J/ψπ +π - 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 φs = 70 ± 68 ± 8 mrad. This result is consistent with the Standard Model expectation and previous measurements.
Measurement of the CP-violating phase φs in B-s0→J/ψπ+π- decays
ANDREOTTI, Mirco;CALABRESE, Roberto;CORVO, Marco;FIORE, Marco;FIORINI, Massimiliano;LUPPI, Eleonora;TELLARINI, Giulia;TOMASSETTI, Luca;
2014
Abstract
The mixing-induced CP-violating phase φs in Bs0 and B-s0 decays is measured using the J/ψπ +π - 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 φs = 70 ± 68 ± 8 mrad. This result is consistent with the Standard Model expectation and previous measurements.File in questo prodotto:
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