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

Bhattacharyya, Gautam ; Datta, Amitava (1999) Effects of R-parity violation on direct CP violation in B decays and extraction of γ Physical Review Letters, 83 (12). pp. 2300-2303. ISSN 0031-9007

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Official URL: http://journals.aps.org/prl/abstract/10.1103/PhysR...

Related URL: http://dx.doi.org/10.1103/PhysRevLett.83.2300

Abstract

In the standard model, direct CP-violating asymmetries for B± → π±K are ∼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 O(100%) CP asymmetry in this channel. Such effects drastically modify the allowed range of the Cabibbo-Kobayashi-Maskawa parameter γ arising from the combinations of the observed charged and neutral B decays in the πK 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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