R-parity Violating Radiative Photino Decay in Supersymmetric Models

TL;DR

This paper investigates the decay modes of the photino in supersymmetric models with R-parity violation, showing that certain couplings significantly influence decay widths compared to R-parity conserving scenarios.

Contribution

It provides a detailed analysis of how R-parity violating couplings affect photino decay channels and their relative widths in MSSM and GMSB models.

Findings

Photino decay into photon + neutrino dominates for larger R-parity violating couplings.

Decay widths into photon + neutrino exceed those into photon + goldstino under certain coupling conditions.

The results highlight the importance of R-parity violation in supersymmetric particle decay phenomenology.

Abstract

It has been shown that unless the tri-linear R-parity violating coupling $\lambda_{i33}$ (i = 1, 2) is small enough ($\lambda_{i33}<$ ${10}^{-2}$ for MSSM and ${10}^{-3}$ for GMSB model),the partial decay width of photino decaying into 'photon + $\nu_{e,\mu}$', both in supergravity motivated (MSSM) and gauge mediated (GMSB) supersymmetric models are larger than the partial decay width of photino decaying into 'photon + goldstino' in R-parity conserving GMSB model including one loop supersymmetric QED correction.