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HEP - ASTRO SEMINAR | Particle-Antiparticle Oscillation and CP Violation in D<sup>0</sup> -> Kp and B<sub>s</sub> -> D<sub>s</sub> pi Decays

Monday, November 18, 2013
5:00 AM
335 West Hall

Particle-antiparticle oscillation (also called mixing) and CP violation are sensitive to Beyond the Standard Model (BSM) amplitudes as well as Standard Model amplitudes. Studies of mixing in the D and Bs systems probe mass scales much higher than the Higgs mass and complement direct searches for BSM physics at the LHC. This talk will provide a general introduction to the phenomenology of particle-antiparticle mixing and CP violation, followed by discussions of specific measurements. The primary focus will be the study of D0 -> D0 and D0 -> D0 oscillations using ~ 2.3 × 105 “wrong-sign” (WS) Kp and approximately 230 times more “right sign” (RS) decays. The differences of the D0 and D0 WS/RS ratios as functions of decay time are sensitive to both direct CP violation and indirect CP violation. I will discuss the results themselves and bounds on CP violation when they are combined with other measurements. In addition, I will discuss LHCb's recent measurement of the Bs oscillation frequency using Bs -> Ds pi decays.