Effects of New Physics on CP Violation in B Decays

Abstract

We discuss two models with 1 extra CP phase in $b\leftrightarrow s$ transition. The CP phase $\arg (V_{t^\prime s}V_{t^\prime b})$ with fourth generations, previously ignored, could impact on $b\to s\ell^+\ell^-$, $\Delta m_{B_s}$ and $\sin2\Phi_{B_s}$, but does not affect EM and strong penguins. With SUSY at TeV scale, a right-handed ``$\widetilde{sb}_{1}$'' squark can be driven light by flavor mixing. It does not affect $b\to s\ell^+\ell^-$, but can generate $S_{\phi K_S} < 0$ while giving $S_{\eta^\prime K_S} \sim \sin2\Phi_{B_d} \cong0.74$. $B_s$ mixing and $\sin2\Phi_{B_s}$ would likely be large, and $S_{K_S\pi^0\gamma}\neq 0$ in $B^0\to K^{*0}\gamma$ is promising.Comment: 3 pages, 3 figures. Talk presented at EPS2003 Conference, Aachen, Germany, July 200