Two-loop neutrino masses with large R-parity violating interactions in supersymmetry

Dey, Paramita; Kundu, Anirban; Mukhopadhyaya, Biswarup; Nandi, Soumitra

Two-loop neutrino masses with large R-parity violating interactions in supersymmetry

Authors

Dey, Paramita

Kundu, Anirban

Mukhopadhyaya, Biswarup

Nandi, Soumitra

Description

We attempt to reconcile large trilinear R-parity violating interactions in a supersymmetric (SUSY) theory with the observed pattern of neutrino masses and mixing. We show that, with a restricted number of such interaction terms with the $λ'$-type couplings in the range (0.1-1.0), it is possible to forbid one-loop contributions to the neutrino mass matrix. This is illustrated with the help of a `working example' where an econnomic choice of SUSY parameters is made, with three non-vanishing and `large' R-parity violating terms in the superpotential. The two-loop contributions in such a case can not only generate the masses in the requisite order but can also lead us to specific allowed regions of the parameter space.
Revised version, 25 pages, 16 figures