CP violation in B-Bbar mixing in semileptonic decays

by Dr Chih-hsiang Cheng (Caltech), Chih-hsiang Cheng (u)

Tuesday 17 Mar 2015, 12:30 → 13:30 US/Pacific

Madrone (SLAC)

B-Bbar oscillations of neutral B mesons are flavor-changing neutral current processes that change the b flavor by two units. These processes are excellent laboratories for probing new physics effects. In the standard model, the oscillation probabilities of B and anti-B mesons are allowed to be different due to complex phases in the matrix elements of the effective Hamiltonian. This CP asymmetry between B and anti-B mesons is, however, an order of magnitude smaller than the current experimental sensitivity. A nonzero measurement of CP asymmetry in mixing would indicate the effects of new physics. I will present recent experimental results using semileptonic B decays from B-factories and hadronic machines with a focus on BABAR results, and model-independent constraints on the new physics parameter space.

pictures dilep_R3_Dilepton_190068_d9f_1.pdf Screen_Shot_2014-08-29_at_11.31.50_PM.png

Slides slac_seminar_cpvmixing_20150317.pdf