Neutrino masses in RPV models with two pairs of Higgs doublets

Abstract

We study the generation of neutrino masses and mixing in supersymmetric R-parity violating models containing two pairs of Higgs doublets. In these models, new RPV terms ${\hat{H}}_{D_1}{\hat{H}}_{D_2}\hat{E}$ arise in the superpotential, as well as new soft terms. Such terms give new contributions to neutrino masses. We identify the different parameters and suppression/enhancement factors that control each of these contributions. At tree level, just like in the MSSM, only one neutrino acquires a mass due to neutrino-neutralino mixing. There are no new one loop effects. We study the two loop contributions and find the conditions under which they can be important.

Comments: 22 pages, 5 figures, 3 appendices