generate a Dirac mass term for the neutrinos and the introduction of an extra charged singlet scalar is a very economical way to generate neutrino Majorana masses in such a scenario. Hence it is quite natural to extend the Zee model in a simple LRS framework to generate the neutrino masses and mixings.

There are several other advantages of LRS extended Zee model. Firstly, since the neutrino Majorana masses are generated at one-loop, the right-handed neutrino masses also remain quite light ranging from a few MeV to a few eV. This is quite different from other LRS scenarios, where right-handed neutrinos are very heavy with masses proportional to the right-handed symmetry breaking scale (typically more than a few TeV). The presence of lighter right-handed neutrino states is a unique feature of this model. The recent results from the LSND [@Athanassopoulos:1995iw; @Aguilar:2001ty] and MiniBooNE experiments [@AguilarArevalo:2007it; @AguilarArevalo:2010wv; @Aguilar-Arevalo:2013pmq] hint at the existence of a light sterile neutrino with mass around a few eV. The LRS Zee model would be a prime candidate for explaining such a particle if these experimental results were to persist. Another important consequence of light right-handed neutrinos is the enhanced cross-section for the production of the $SU(2)_{L/R}$ 