On Measuring CP Violating Phase $\gamma$ Using Neutral $B$ Decays

Abstract

We propose two independent methods to determine the CKM phase $\gamma$ and the tree and penguin amplitudes using neutral $B$ decays, assuming that the phase $\beta$ is known. Based on flavor SU(3) symmetry and SU(3) breaking effect, one method uses the decay processes $B^0(t)\to {\pi }^0{K}_S$, $B^0\to \eta K^0(K_S\to \pi \pi )$ and their charge-conjugate processes, and the other uses the processes $B^0(t)\to {\pi }^0{K}_S$, $B^0\to {\pi }^0{\pi }^0$ and their charge-conjugate processes. From SU(3) breaking consideration, the latter method would be more useful.

10 pages (Latex), No figures