Radiative and Electroweak Penguin Decays of B Mesons

The huge datasets collected at the two B factories, Belle and BaBar, have made it possible to explore precisely the radiative penguin process b --> s gamma, and to study the electroweak penguin process b --> s l+ l- and the suppressed radiative process b --> d gamma in detail, all in exclusive channels and inclusive measurements. Theoretical tools have also advanced to meet or surpass the experimental precision especially in inclusive calculations and various ratios of exclusive channels. In this article, we review the theoretical and experimental progress in the radiative and electroweak penguin decays of B mesons in the past decade.