Weak Coupling Phase from Decays of Charged B Mesons to $\pi K$ and $\pi \pi$

Abstract

The theory of $CP$ violation based on phases in weak couplings in the Cabibbo-Kobayashi-Maskawa (CKM) matrix requires the phase $\gamma \equiv \mathrm{Arg}{V}_{ub}^{\ast }$ (in a standard convention) to be nonzero. A measurement of $\gamma$ is proposed based on charged $B$ meson decay rates to ${\pi }^{+}{K}^0$, ${\pi }^0{K}^{+}$, ${\pi }^{+}{\pi }^0$, and the charge-conjugate states. The corresponding branching ratios are expected to be of the order of $10^{-5}$. (submitted to Physical Review Letters)

Comments: LaTeX, 8 pages, 2 figures (not included, available upon request), TECHNION-PH-94-7, EFI-94-14, UdeM-LPN-TH-94-192