22-28 July 2010
Palais des Congrès de Paris
Europe/Paris timezone

New measurement of the B0_s mixing phase at CDF

24 Jul 2010, 14:30
Salle 242A ()

Salle 242A

Parallel Session Talk 06 - CP violation, CKM and Rare Decays 06 - CP violation, CKM and Rare Decays


Gavril Giurgiu (Johns Hopkins)


CDF presents improved bounds on the CP-violating phase beta_s and on the decay-width difference DeltaGamma_s of the neutral B0_s meson system. We use 6500 B0_s --> J/psi phi decays collected by the dimuon trigger and reconstructed in a sample corresponding to 5.2 fb^{-1} of data. Besides exploiting a two-fold increase in statistics with respect to the previous measurement, several improvements have been introduced in the analysis including a fully data-driven flavor-tagging calibration and proper treatment of possible S-wave contributions.

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