Direct CP Violation in $B^\pm\toρ^\pmπ^+π^-$ in the $ρ^0$-$ω$ Interference Region

Details Direct CP Violation in $B^\pm\toρ^\pmπ^+π^-$ in the $ρ^0$-$ω$ Interference Region Direct CP Violation in $B^\pm\toρ^\pmπ^+π^-$ in the $ρ^0$-$ω$ Interference Region

1997-07-22

arxiv.org/abs/hep-ph/9707414v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, LaTeX, aipproc.sty, talk presented at CIPANP97, Big Sky, MT

Scientific paper

10.1063/1.54327

We study direct CP violation in $B^\pm \to \rho^\pm\rho^0(\omega) \to \rho^\pm\pi^+\pi^-$ and focus specifically on the rate asymmetry in the $\rho^0$-$\omega$ interference region. Here the strong phase is dominated by isospin violation, so that it can be essentially determined by $e^+e^- \to \rho^0 (\omega) \to \pi^+\pi^-$ data. We find the CP-violating asymmetry to be of the order of 20% at the $\omega$ invariant mass. Moreover, it is robust with respect to the estimable strong-phase uncertainties, permitting the extraction of $\sin\alpha$ from this channel.

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