Constraining Bilinear R-Parity Violation from Neutrino Masses

TL;DR

This paper constrains bilinear R-parity violating parameters in the MSSM by comparing theoretical neutrino mass matrices with experimental data, including oscillation results and neutrinoless double beta decay, and explores their effects on neutrino magnetic moments.

Contribution

It provides new bounds on bilinear R-parity violating couplings using 1-loop neutrino mass calculations and experimental constraints, including CP phases and neutrinoless double beta decay data.

Findings

Constraints on bilinear coupling constants derived from neutrino oscillation data.

Calculated contributions to Majorana neutrino transition magnetic moments.

Established bounds consistent with GUT-scale parameter unification.

Abstract

We confront the R-parity violating MSSM model with the neutrino oscillation data. Investigating the 1-loop particle-sparticle diagrams with additional bilinear insertions on the external neutrino lines we construct the relevant contributions to the neutrino mass matrix. A comparison of the so-obtained matrices with the experimental ones assuming normal or inverted hierarchy and taking into account possible CP violating phases, allows to set constraints on the values of the bilinear coupling constants. A similar calculation is presented with the input from the Heidelberg-Moscow neutrinoless double beta decay experiment. We base our analysis on the renormalization group evolution of the MSSM parameters which are unified at the GUT scale. Using the obtained bounds we calculate the contributions to the Majorana neutrino transition magnetic moments.