Author: Yuval Grossman, Howard E. Haber
Title: Neutrino masses and sneutrino mixing in R-parity violatingsupersymmetry
Abstract: R-parity-violating supersymmetry with a conserved baryon number B provides a framework for particle physics with lepton number (L) violating interactions. Two important probes of the L-violating physics are neutrino masses and sneutrino-antisneutrino mass-splittings. We evaluate these quantities in the context of the most general CP-conserving, R-parity-violating B-conserving extension of the minimal supersymmetric standard model. In generic three-generation models, three sneutrino-antisneutrino mass splittings are generated at tree-level. In contrast, only one neutrino mass is generated at tree-level; the other two neutrinos acquire masses at one-loop. In many models, the dominant contribution to the radiative neutrino masses is induced by the non-zero sneutrino-antisneutrino mass splitting.
Comments: 9 pages, no figures. Invited talk presented by Yuval Grossman at the American Physical Society (APS) meeting ofthe Division of Particles and Fields (DPF99)Report-no: SLAC-PUB-8173, SCIPP-99/24