Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2010-11-26
Physics
High Energy Physics
High Energy Physics - Experiment
Proceedings of CKM2010, the 6th International Workshop on the CKM Unitarity Triangle, University of Warwick, UK, 6-10 Septembe
Scientific paper
We present improved bounds on the CP-violating phase \beta_s^{\Jpsi\phi} and on the decay-width difference \Delta\Gamma of the neutral B_s^0 meson system obtained by the CDF experiment at the Tevatron collider . We use 6500 B_s^0 --> J/psi phi decays collected by the dimuon trigger and reconstructed in a sample corresponding to integrated luminosity of 5.2 fb-1. 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 flavour-tagging calibration and proper treatment of possible S-wave contributions.
for the CDF Collaboration
Kreps Michal
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