Phenomenology of the new physics coming from 2HDMs to the neutrino magnetic dipole moment

Abstract

In several frameworks for leptons-sectors of two Higgs doublet models, we calculate the magnetic dipole moment for the different flavor types of neutrino. Computations are carried out by assuming a normal hierarchy for neutrino masses, and analyzing the process ν → νγ with a charged Higgs boson into the loop. The analysis was performed by sweeping the charged Higgs mass and taking into account the experimental constraints for relevant parameters in Two Higgs Doublet Models with and without flavor changing neutral currents; obtaining magnetic dipole moments close to the experimental thresholds for tau neutrinos in type II and Lepton-specific cases. In the neutrinospecific scenario, the contribution of new physics could be sizeable to the current measurement for flavor magnetic dipole moment. This fact leads to excluding possible zones in the parameter space of charged Higgs mass and vacuum expectation value of the second doublet.

Contribution to the neutrino magnetic moment coming from 2HDM in presence of magnetic fields

“…The contribution to the MDM due to the presence of magnetic fields is below the SM contribution for all models (with and without natural flavor conservation). Furthermore, as our recent work has showed [4], contributions from magnetic fields are less than those obtained in the vacuum for the models considered. As it happens in analyses from vacuum for MDM, there is a strong relationship among MDM, neutrino and charged lepton masses.…”