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

Gautam Bhattacharyya·Amitava Datta
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Abstract

In the standard model, direct CP-violating asymmetries for $B^\pm \to π^\pm K$ 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 $γ$ 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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Gautam Bhattacharyya, Amitava Datta. 1999-08-20. Effects of R-parity violation on direct CP violation in B decays and extraction of $γ$. https://doi.org/10.1103/physrevlett.83.2300

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