Abstract
The ratio of partial decay rates for charged and neutral $B$ mesons to $K\ensuremath{\pi}$ final states provides information on the weak phase $\ensuremath{\gamma}\ensuremath{\equiv}\mathrm{Arg}{(V}_{\mathrm{ub}}^{*})$ when augmented with information on the $\mathrm{CP}$-violating asymmetry in the ${K}^{\ifmmode\pm\else\textpm\fi{}}{\ensuremath{\pi}}^{\ensuremath{\mp}}$ mode. The requirements for a useful determination of \ensuremath{\gamma} are examined in the light of present information about the decays ${B}^{0}\ensuremath{\rightarrow}{K}^{+}{\ensuremath{\pi}}^{\ensuremath{-}},$ ${B}^{+}\ensuremath{\rightarrow}{K}^{0}{\ensuremath{\pi}}^{+},$ and the corresponding charge-conjugate modes. The effects of electroweak penguin diagrams and rescattering corrections are noted, and proposals are made for estimating and measuring their importance.
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