# Neutrino self-energy with new physics effects in an external magnetic field

## TL;DR

This paper calculates the magnetic dipole moment of massive neutrinos in a magnetized medium within a minimal extension of the Standard Model, revealing potential for stronger constraints on new physics.

## Contribution

It introduces a novel calculation of neutrino magnetic moments considering new physics effects in a magnetic field using a specific minimal model with a second Higgs doublet.

## Key findings

- Neutrino magnetic dipole moments exceed Standard Model predictions in the considered scenario.
- Results suggest closer proximity to experimental bounds, enabling stronger exclusion limits.
- Analysis covers a range of charged Higgs masses and neutrino mass hierarchies.

## Abstract

We compute the magnetic dipole moment (MDM) for massive flavor neutrinos using the neutrino self-energy in a magnetized media. The framework to incorporate neutrino masses is one minimal extension of the Standard Model in which neutrinos are Dirac particles and their masses coming from tiny Yukawa couplings from a second Higgs doublet with a small vacuum expectation value. The computations are carried out by using proper time formalism in the weak field approximation $eB<<m_{e}^{2}$ and assuming normal hierarchy for neutrino masses and sweeping the charged Higgs mass. For $\nu_{\tau}$, analyses in the neutrino specific scenario indicate magnetic dipole moments greater than the values obtained to the MDM in the SM (with and without magnetic fields) and other flavor conserving models. This fact leading a higher proximity with experimental bounds and so on it is possible to get stronger exclusion limits over new physics parameter space.