The CP violating asymmetry in $B^{\pm} \to M {\bar M} π^{\pm}$ decays

Details The CP violating asymmetry in $B^{\pm} \to M {\bar M} π^{\pm}$ decays The CP violating asymmetry in $B^{\pm} \to M {\bar M} π^{\pm}$ decays

1998-09-04

arxiv.org/abs/hep-ph/9809262v1

Phys.Lett.B447:313-320,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, latex, 1 figure, submitted to Phis. Lett. B

Scientific paper

10.1016/S0370-2693(98)01586-X

We analyze the asymmetry in the partial widths for the decays $B^{\pm} \to M {\bar M} \pi^{\pm}$ ($ M = \pi^+, K ^+, \pi^0, \eta$), which results from the interference of the nonresonant decay amplitude with the resonant amplitude for $B^{\pm} \to \chi_{c0} \pi^{\pm} $ followed by the decay $\chi_{c0} \to M {\bar M} $. The CP violating phase $\gamma$ can be extracted from the measured asymmetry. We find that the partial width asymmetry for $B^\pm \to \pi^+ \pi^- \pi^\pm$ is about $0.33~sin \gamma$, and about $0.45~ sin \gamma$ for $B^\pm \to K^+ K^-\pi^\pm$, while it is somewhat smaller for $B^\pm \to \pi^0 \pi^0 \pi^\pm$ and $B^\pm \to \eta \eta \pi^\pm$. Potential sources of uncertainties in these results, primarily coming from poorly known input parameters, are discussed.

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