1999/03/31 by Gautam Bhattacharyya, Amitava Datta · 1 citation
Physics and Astronomy · #Neutrino Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevlett.83.2300
published as Phys.Rev.Lett. 83 (1999) 2300 · Latex, 5 pages; minor changes, to appear in Phys Rev Lett
arxiv created 1999/08/20 · openalex publication_date 1999/09/20 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
In the standard model, direct CP-violating asymmetries for B^\ifmmode±\else\textpm\fi\ensuremath→\ensuremathπ^\ifmmode±\else\textpm\fiK are \ensuremath∼2% based on perturbative calculation. Rescattering effects might enhance it to at most \ensuremath∼(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 \ensuremathγ arising from the combinations of the observed charged and neutral B decays in the \ensuremathπK modes. With a multichannel analysis in B decays, one can either discover this exciting new physics, or significantly improve the existing constraints on it.