Standard model and CP violations in neutral K- and B-meson systems

SUSY CP violations in K and B systems

I report our recent works on the effects of CP violating phases in SUSY models on B and K phenomenology.

CP violation in neutral-B-meson decays in the standard and superweak models.

l discuss the ambiguities in distinguishing the standard model from superweak models using CP-violating neutral-B-meson decay asymmetries. There is a significant region of parameter space where it will be difficult to make the distinction even with IOO fb ' of luminosity at the Y(4S). Even nearly 30 years after its discovery, CP nonconser-vation remains a tantalizing and important mystery. So f...

Standard-model predictions for CP violation in B0-meson decay.

Standard - model predictions for CP violation in 8 - meson decay

We examine the present set of constraints on the parameters of the standard model and use the unitarity triangle to present their allowed range. We give the implications of this for CP violation in the B-meson system as a function of top-quark mass, emphasizing what luminosity of an electronpositron collider is needed to guarantee a statistically significant asymmetry in one or more B decay cha...

Standard Model Matrix Elements for Neutral B-Meson Mixing and Associated Decay Constants

We present results of quenched lattice calculations of the matrix elements relevant for Bd−B̄d and Bs−B̄s mixing in the Standard Model. Results for the corresponding SU(3)-breaking ratios, which can be used to constrain or determine |Vtd|, are also given. The calculations are performed at two values of the lattice spacing, corresponding to β = 6.0 and β = 6.2, with quarks described by a mean-fiel...