Abstract
The time-dependent asymmetry in decays is measured using collision data, corresponding to an integrated luminosity of , collected with the LHCb detector at center-of-mass energies of 7 and 8 TeV. In a sample of 96 000 decays, the -violating phase is measured, as well as the decay widths and of the light and heavy mass eigenstates of the system. The values obtained are , , and , where the first uncertainty is statistical and the second, systematic. These are the most precise single measurements of those quantities to date. A combined analysis with decays gives . All measurements are in agreement with the standard model predictions. For the first time, the phase is measured independently for each polarization state of the system and shows no evidence for polarization dependence.
- Received 12 November 2014
DOI:https://doi.org/10.1103/PhysRevLett.114.041801
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© 2015 CERN, for the LHCb Collaboration