Lepton flavor specific extended Higgs model

Neutrino Masses, Lepton Flavor Violations, and Flavor Changing Neutral Currents in Composite Little Higgs Model

Little higgs theories attribute light higgs to being one of a set of pseudo Nambu Goldstone bosons. This implies that the UV cutoff of the little higgs models should be around 10 TeV, and a new physics resides above the UV cutoff. The composite little higgs model, a candidate for UV physics of the littlest higgs model, incorporates supersymmetry into strong gauge dynamics. We find that this con...

Limits on doubly charged Higgs bosons and lepton-flavor violation.

Lepton Flavor Violation in the Two Higgs Doublet Model type III

We consider the Two Higgs Doublet Model (2HDM) of type III which leads to Flavour Changing Neutral Currents (FCNC) at tree level in the leptonic sector. In the framework of this model we can have, in principle, two situations: the case (a) when both doublets acquire a vacuum expectation value different from zero and the case (b) when only one of them is not zero. In addition, we show that we ca...

Lepton Flavor Violation in the Standard Model Extended by Heavy Singlet Dirac Neutrinos

Low energy neutrinoless lepton flavor violating (LFV) processes are studied in an extension of the Standard Model (SM) by heavy SU(2) × U(1) singlet Dirac neutrinos. An upper bound procedure is elaborated for the evaluation of amplitudes. A comment on the extraction of heavy neutrino mixings from astrophysical observations is given. For processes not treated in the applied model the formalism f...

Supersymmetric Lepton Flavor Violation

We study a new supersymmetric mechanism for lepton flavor violation in a minimal extension of the MSSM with low-mass heavy singlet neutrinos, which is fully independent of the flavour structure of the soft SUSY breaking sector. We find that l→ l′γ processes are forbidden in the SUSY limit, whilst the processes l→ l′l1l2 and μ → e conversion in nuclei can be enhanced well above the observable le...