Computation of Neutrino Masses in R-parity Violating Supersymmetry: SOFTSUSY3.2

TL;DR

This paper extends the SOFTSUSY program to include one-loop R-parity violating effects, enabling more accurate predictions of neutrino masses and mixing in the MSSM, aligning theoretical results with experimental neutrino data.

Contribution

The paper introduces an extension to SOFTSUSY that incorporates one-loop effects for neutrino mass calculations in R-parity violating MSSM, improving accuracy and predictive capability.

Findings

Inclusion of one-loop effects allows up to three massive neutrinos.

Refined electroweak symmetry breaking calculations.

Provides a manual for the neutrino mass prediction mode.

Abstract

The program SOFTSUSY can calculate tree-level neutrino masses in the R-parity violating minimal supersymmetric standard model (MSSM) with real couplings. At tree-level, only one neutrino acquires a mass, in contradiction with neutrino oscillation data. Here, we describe an extension to the SOFTSUSY program which includes one-loop R-parity violating effects' contributions to neutrino masses and mixing. Including the one-loop effects refines the radiative electroweak symmetry breaking calculation, and may result in up to three massive, mixed neutrinos. This paper serves as a manual to the neutrino mass prediction mode of the program, detailing the approximations and conventions used.