Penguins in CP violating B decays

Abstract

The role of penguin amplitudes in CP violating $B$ decays is reviewed, emphasizing recent progress in the analysis of electroweak penguin contributions. It is shown how these terms are included in a model-independent manner when measuring the weak phase $\alpha$ in $B\to \pi \pi$ using isospin symmetry, and when determining the phase $\gamma$ from $B\to K\pi$ applying flavor SU(3). Uncertainties due to rescattering effects in $B\to K\pi$ are discussed.

6 pages, invited talk presented at the 17th International Workshop on Weak Interactions and Neutrinos, Cape Town, South Africa, January 24-30 1999