Lepton-flavour-violation in Susy Models with and without R-parity
نویسنده
چکیده
Recently, the atmospheric neutrino experiment SuperKamiokande has announced evidence for non-zero neutrino mass, which indicates the existence of physics beyond the Standard Model (SM). Generally in models that accommodate neutrino oscillations, lepton-flavour-violating phenomena (LFV) can occur not only in the neutrino, but also in the charged-lepton sector. In this paper, we will discuss LFV in processes such as μ → eγ, μ → eee, and μ → e conversion in nuclei in two models, which are extensions of the minimal SUSY SM (MSSM): one is the MSSM with right-handed neutrinos (without Rparity violation), the other is the MSSM with R-parity violation. Especially the latter model can also be tested by the HERA experiments; however, the low energy muon-decay experiments provide very stringent bounds on some of the couplings, which are not constrained by HERA. We will also discuss the different features of LFV in these two models.
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