Speaker
Ulrich Nierste
(KIT)
Description
New lattice QCD results from the RBC-UKQCD collaboration have opened the door for a reliable
theory analysis of $\epsilon_K^\prime$, which quantifies direct CP violation
in $K\to \pi\pi$ decays. The Standard-Model (SM) prediction disagrees with
the measurement by 2.9 standard deviations. While in most models of new
physics the data on indirect CP violation (characterized by the
well-understood quantity $\epsilon_K$) preclude sizable effects in
$\epsilon_K^\prime$, large effects are possible in the Minimal
Supersymmetric Standard Model.
Author
Ulrich Nierste
(KIT)
