Constraining an R-parity violating supergravity model with the Higgs induced Majorana neutrino magnetic moments

TL;DR

This paper investigates how R-parity violating supergravity models predict neutrino magnetic moments, analyzing various particle contributions and using experimental data to constrain the model's parameters.

Contribution

It provides a detailed analysis of Majorana neutrino magnetic moments in an RpV supergravity model, highlighting dominant contributions and experimental constraints.

Findings

Charged Higgs bosons and charginos significantly contribute to neutrino magnetic moments.

The model's parameters are constrained by MUNU experimental results.

Some contributions exceed current experimental limits.

Abstract

It is well known, that R-parity violating supersymmetric models predict a non-zero magnetic moment for neutrinos. In this work we study the Majorana neutrino transition magnetic moments within an RpV modified minimal supergravity model. Specifically, we discuss the contributions coming from the charged Higgs bosons, higgsinos, leptons, sleptons, charged gauge bosons, and charginos. We use the experimental results from the MUNU collaboration to restrict the model's parameter space. A comparison with two other types of contributions (only trilinear RpV couplings and trilinear plus neutrino--neutralino mixing) is also presented. We have found that the presently discussed processes dominate significantly, exceeding in some cases even the experimental limits.