Radiative $W$ and $Z$ Decays and Spontaneous R-Parity Violation

Abstract

We point out that in a class of supersymmetric models where R-parity violation is induced by the spontaneous breaking of local $B-L$ symmetry, the R-parity violating $W$ decay $W\to \text{slep}\gamma$ and $Z$ decay $Z\to \text{snu}\gamma$, forbidden in the minimal supersymmetric standard model (MSSM), occur at an enhanced rate compared to other models with R-parity breaking. We find that the branching fractions for these modes can be of order $10^{-5}$ .

Comments: 15 pages, 4 figures(available upon request), LaTex, UMD-PP-93-90