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Higgs--mediated K -> pi nu nu-bar in the MSSM at large tan(beta)

G. Isidori·P. Paradisi
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Abstract

We analyze the impact of Higgs-mediated amplitudes on the rare decays KL -> pi0 nu nu-bar and K+ -> pi+ nu nu-bar in the MSSM with large tan(beta) and general flavour mixing. We point out that, going beyond the minimal flavour violation hypothesis, Z-penguin amplitudes generated by charged-Higgs exchange can induce sizable modifications of K -> pi nu nu-bar rates. Interestingly, these effects scale as tan^4(beta) at the amplitude level. For large values of tan(beta), this mechanism allows deviations from the SM expectations even for tiny (CKM-type) off-diagonal mixing terms in the right-handed squark sector.

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G. Isidori, P. Paradisi. 2006-01-12. Higgs--mediated K -> pi nu nu-bar in the MSSM at large tan(beta). https://doi.org/10.1103/physrevd.73.055017

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