Supersymmetric contributions to direct CP violation in K -> pi pi gamma decays

Details Supersymmetric contributions to direct CP violation in K -> pi pi gamma decays Supersymmetric contributions to direct CP violation in K -> pi pi gamma decays

1999-08-19

arxiv.org/abs/hep-ph/9908415v2

Phys.Lett. B470 (1999) 134-141

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, Latex. Numerical error in Eq.(36) corrected, conclusions unchanged; version to appear in Phys. Lett. B

Scientific paper

10.1016/S0370-2693(99)01308-8

We analyze the supersymmetric contributions to direct-CP-violating observables in $K \to \pi\pi\gamma$ decays induced by gluino-mediated magnetic-penguin operators. We find that $\epsp_{+-\gamma}$ and the differential width asymmetry of $K^\pm \to \pi^\pm \pi^0 \gamma$ decays could be substantially enhanced with respect to their Standard Model values, especially in the scenario where $\epsp/\eps$ is dominated by supersymmetric contributions. These observables could therefore provide a useful tool to search for New Physics effects in $|\Delta S|=1$ transitions, complementary to $\epsp/\eps$ and rare decays.

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