High Energy Physics Seminars

ics High Energy
Wednesday, April 4, 2012
3:30 PM
Physics Building, Room 204
Gavril Giurgiu [Host: Brad Cox]
Johns Hopkins University
"Measurement of CP Violation in Bs to J/Psi Phi Decays at CDF"
 Slideshow (PDF)
We present a measurement of the CP-violating parameter beta_s using approximately 6500 Bs to J/Psi Phi decays reconstructed with the CDFII detector in a sample corresponding to 5.2/fb of integrated luminosity. We find the CP-violating phase to be within the range [0.02, 0.52] U [1.08, 1.55]$ at 68% We consider the inclusion of a potential S-wave contribution to the Bs to J/psi K+K- final state which is found to be negligible over the KK mass interval considered. We also present measurements of the Bs decay width difference and mean lifetime as well as the final state polarization fractions.

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