CP Violation in the B System: What's Old, What's New?

Abstract

I review the many ways of obtaining information about the CKM matrix through CP violation in the $B$ system. I include direct and indirect CP violation, the role of penguins and isospin analysis, tagging, and $B\to DK$ decays. I also discuss recent developments showing how to use $SU(3)$ flavor symmetry, along with some dynamical approximations, to extract from $B$ decays to $\pi\pi$, $\pi K$ and $K\kbar$ the weak CKM phases, the strong phase shifts, and the sizes of the various contributing diagrams. Finally, I briefly show what can be learned from an exact treatment of the CKM matrix. (Talk given at the 5th Conference on the Intersections of Particle and Nuclear Physics, St. Petersburg, Florida, USA, May 31-June 6, 1994.)