Measurement of beta_s at CDF

Details Measurement of beta_s at CDF Measurement of beta_s at CDF

2011-02-02

arxiv.org/abs/1102.0436v1

Physics

High Energy Physics

High Energy Physics - Experiment

Proceedings of FPCP 2010, 7 pages, 4 figures

Scientific paper

The latest results for the measurement of the CP violating phase beta_s in B0s -> J/psi phi decays, from 5.2 fb-1 integrated luminosity of CDF data are presented. For the first time, this measurement includes the contribution of B0s -> J/psi K+K- or B0s -> J/psi f0 events to the signal sample, where the f0 and non-resonant K+K- are S-wave states. Additional improvements to the analysis include more than doubling the signal sample, improved selection and particle ID, and fully calibrated flavour tagging for the full dataset. Additionally, the world's most precise single measurements of the B0s lifetime, tau_s, and width difference, DeltaGamma_s are given.

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