New Physics Effects on CP Violation in $B$ Decays

We review new physics effects on CP violation in B decays. We describe the Standard Model predictions for the various types of CP asymmetries and discuss the theoretical cleanliness of these predictions. We point out the ingredients in the analysis that are most sensitive to new physics and deduce the type of new physics that is likely to modify the Standard Model predictions. Several explicit examples are discussed in detail. Finally, we explain how, if deviations from the Standard Model predictions are measured, we will be able to learn detailed features of the new physics involved. Plenary talk presented at the Workshop on B Physics at Hadron Accelerators, Snowmass, Colorado, June 21 - July 2, 1993.