Thursday, May 25, 2006, 11:00 am — Small Seminar Room, Bldg. 510
The Bs meson oscillates between the particle and
anti-particle state with a frequency of about 3 1012 Hz. A precise determination of the mixing frequency contributes to a stringent test of the unitarity of the CKM matrix and is sensitive to signatures of new physics.
I will present the recent result on Bs mixing using 1 fb^{-1} of data from proton anti-proton collisions collected with the CDF II detector at the Fermilab Tevatron.
The analysis combines hadronic and semileptonic decays and uses both opposite-side and same-side flavor identification methods. We find a signal consistent with Bs oscillations. The probability that random fluctuations could produce a comparable signal is 0.5\%. We measure delta-ms = 17.33 ? 0.42/0.21 (stat) ? 0.07 (syst) ps^{-1}.
Hosted by: Laurie Littenberg
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