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

TL;DR

This paper investigates how two Higgs doublet models influence neutrino magnetic dipole moments, analyzing different flavor types and parameter spaces, and comparing results with experimental constraints.

Contribution

It provides a detailed calculation of neutrino magnetic dipole moments within 2HDMs, considering flavor types, mass hierarchies, and experimental limits, highlighting potential new physics effects.

Findings

Magnetic dipole moments near experimental thresholds for tau neutrinos in certain 2HDM types.

New physics contributions could be significant in neutrino-specific scenarios.

Excluded parameter regions based on current experimental constraints.

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 $\nu \rightarrow \nu \gamma $ 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 neutrino-specific 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.