A framework for baryonic R-parity violation in grand unified theories

Abstract

We investigate the possibility of obtaining sizeable R-parity breaking interactions violating baryon number but not lepton number within supersymmetric grand unified theories. Such a possibility allows to ameliorate the naturalness status of supersymmetry while maintaining successful gauge coupling unification, one of its main phenomenological motivations. We show that this can be achieved without fine-tuning or the need of large representations in simple SO(10) models.

Comments: 14 pages, 1 figure. Minor corrections and references added. To appear in Phys. Rev. D