Lepton Universality Breaking vs Lepton Flavor Violation in Kaon Physics
نویسنده
چکیده
Deviations from the Standard Model (SM) expectations of the Lepton Universality (LU) breaking represent a powerful tool to probe New Physics (NP) effects. Kaon physics is an obvious ground where to perform such tests, for instance in the well studied R K = B(K → eν)/B(K → μν). Supersymmetric (SUSY) extensions of the Standard Model can exhibit μ − e non-universal contributions. Their origin is twofold: those deriving from lepton flavor conserving couplings are subdominant with respect to those arising from lepton flavor violating (LFV) sources. μ −e nonuniversality in K`2 is quite effective in constraining relevant regions of SUSY models with LFV. A comparison with analogous bounds coming from τ LFV decays shows the relevance of the measurement of R K to probe LFV in SUSY.
منابع مشابه
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تاریخ انتشار 2007