Upper bounds on allR-parity-violatingλλcombinations from proton stability

Abstract
In an R-parity-violating supersymmetric theory, we derive upper bounds on all the λijkλijk-type combinations from the consideration of proton stability, where λijk are baryon-number-violating couplings involving three baryonic fields and λijk are lepton-number-violating couplings involving three leptonic fields.