Radiative Penguin decays at Belle

Abstract

We present recent progresses in radiative penguin decays of $B$ meson using a large sample of $B\bar{B}$ pairs recorded at the ${\rm Y}(4S)$ resonance with the Belle detector at the KEKB asymmetric energy $e^{+}{e}^{-}$ collider. We report precise measurement of inclusive $b\to s\gamma$ branching ratio with cut $E_{\gamma }>1.7$ GeV, first measurement of time-dependent CP-violation in $B^0\to K_s{\rho }^0\gamma$, measurement of $B^{+}\to K^{+}{\eta }^{\prime }\gamma$ branching fraction, and improved branching fraction results for $B^0\to (\rho ,\omega )\gamma$ with new CP and isospin violation results in the mode.

Parallel talk at 34th International Conference on High Energy Physics, Philadelphia, USA, 2008. 4 pages, LaTeX, 4 figures