Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2010-12-05
Physics
High Energy Physics
High Energy Physics - Experiment
35th International Conference of High Energy Physics - ICHEP2010, July 22-28, 2010, Paris, France. Submitted to Proceedings of
Scientific paper
The CDF collaboration presents an updated measurement of the CP-violating parameter beta_s and of the decay width difference Delta Gamma_s using approximately 6500 Bs to J/Psi Phi decays collected by the dimuon trigger and reconstructed in a data sample corresponding to 5.2/fb of integrated luminosity. Besides exploiting the two-fold increase in the data sample 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. We find that the CP-violating phase is within the range beta_s in [0.02, 0.52] U [1.08,1.55] at 68C.L. The Standard Model p-value is 0.31. The decay width difference is found to be Delta Gamma_s = 0.075 +/- 0.035 (stat) +/- 0.01 syst 1/ps. In addition, we present the most precise mean Bs lifetime tau_s, polarization amplitudes |A_0|^2, |A_{\parallel}|^2 and |A_{\perp}|^2, as well as strong phase delta_perp: tau_s = 458.6 +/- 7.6$ (stat) +/- 3.6 (syst) microns |A_0|^2 = 0.524 +/- 0.013 (stat) +/- 0.015 (syst) |A_{\parallel}|^2 = 0.231 +/- 0.014 (stat) +/- 0.015 (syst) delta_perp = 2.95 +/- 0.64 (stat) +/- 0.07 (syst).
No associations
LandOfFree
New Measurement of the Bs Mixing Phase at CDF does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with New Measurement of the Bs Mixing Phase at CDF, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and New Measurement of the Bs Mixing Phase at CDF will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-517301