New constraints on R-parity violation from proton stability

Abstract

We derive stringent upper bounds on all the $({\lambda }_{ijk}^{\prime \prime }{\mu }_l)$-type combinations from the consideration of proton stability, where ${\lambda }_{ijk}^{\prime \prime }$ are baryon-number-violating trilinear couplings and ${\mu }_l$ are lepton-number-violating bilinear mass parameters in a R-parity-violating supersymmetric theory.

Comments: 4 pages, Latex, uses axodraw.sty (in the revised version all combinations of the form $\lambda {"}_{ijk}{\mu }_l$ have been constrained, using one-loop graphs) To appear in Phys. Lett. B