$SU(5)\times SU(5)$ Unification, Seesaw Mechanism and R-Conservation
arXiv:hep-ph/9601203 · doi:10.1016/0370-2693(96)00470-4
Abstract
A new supersymmetric grand unified model based on the gauge group $SU(5)\times SU(5)$ is discussed. The model has the feature that the conventional seesaw mechanism for neutrino masses is implemented using the $(15, 1)+(1,\bar{15)}$ representation. This multiplet may have a better chance of arising from level two compactification of superstring theories than the the ${bf \bar{126}}$ representation used in the SO(10) model. The model also naturally suppresses all R-parity violating interactions.
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