Effects of R-parity violation on direct CP violation in B decays and extraction of $γ$

Details Effects of R-parity violation on direct CP violation in B decays and extraction of $γ$ Effects of R-parity violation on direct CP violation in B decays and extraction of $γ$

1999-03-25

arxiv.org/abs/hep-ph/9903490v2

Phys.Rev.Lett. 83 (1999) 2300

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex, 5 pages; minor changes, to appear in Phys Rev Lett

Scientific paper

10.1103/PhysRevLett.83.2300

In the standard model, direct CP-violating asymmetries for $B^\pm \to \pi^\pm K$ are roughly 2% based on perturbative calculation. Rescattering effects might enhance it to at most (20-25)%. We show that lepton-number-violating couplings in supersymmetric models without R-parity are capable of inducing as large as 100% CP asymmetry in this channel. Such effects drastically modify the allowed range of the CKM parameter $\gamma$ arising from the combinations of the observed charged and neutral B decays in the $\pi K$ modes. With a multichannel analysis in B decays, one can either discover this exciting new physics, or significantly improve the existing constraints on it.

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