Constraining CP violation in neutral meson mixing with theory input
Dr. Sascha Turczyk (LBNL, Berkeley)

There has been a lot of recent interest in the experimental hints of CP violation in B0 mixing.
The D measurement of the semileptonic CP asymmetry would - with higher signicance - be a clear signal of beyond the standard model physics. In this talk I present a relation [arXiv:1203.3545] for the mixing parameters, which allows clearer interpretation of the data in models in which new physics enters in M_12 and / or Gamma_12. This result implies that the central value of the D measurement in B0 decay is not only in conflict with the standard model, but in a stronger tension with data on Delta Gamma_12 than previously appreciated.
After I derived the relation between the theoretical prediction of |Delta Gamma_12| and the measurements of Delta M, Delta Gamma and A_SL, I will explain how this result can help to better understand the constraints on Delta Gamma_12 or A_SL, whichever is less precisely measured.