Muon conversion to electron in nuclei within the μνSSM with a 125 GeV Higgs

Abstract

Within framework of the µ from ν Supersymmetric Standard Model (µνSSM), three exotic right-handed neutrino superfields induce new sources for lepton-flavor violation. In this work, we investigate muon conversion to electron in nuclei within the µνSSM in detail. With a 125 GeV Higgs, the numerical results indicate that the µ − e conversion rates in nuclei within the µνSSM can reach the experimental upper bound, which could be detected with the future experimental sensitivities.

Muon conversion to an electron in nuclei in the minimal R-symmetric supersymmetric standard model

“…The predictions for CRðμ − e; nucleusÞ in nuclei are not sensitive to tan β or m A and take values in a narrow region. This is a striking difference to some SUSY models [28,29,31,43]. Due to the existence of the transition from d-Higgsino to u-Higgsino in the MSSM, which is governed by the μ term, the well-known tan β enhancement is possible.…”

“…There are a few studies within models of nonsupersymmetry (SUSY), such as unparticle model [19,20], littlest Higgs model [21,22], left-right symmetric models [23], 331 model [24], and so on. There are also a few studies within models of SUSY, such as the minimal supersymmetric Standard Model (MSSM) [25], R-parity violating SUSY [26], low-scale seesaw models of minimal supergravity [27], a minimal supersymmetric extension of the SM with local gauged B and L [28,29], the constrained minimal supersymmetric Standard Model-seesaw [30], μνSSM [31], and so on. μ-e conversion is particularly sensitive to Higgs mediated LFV because it is not suppressed by small Yukawa couplings as μ → eγ and μ → 3e, and Higgs-induced LFV occurs in many NP models [32].…”