Leptoquark mechanism of neutrino masses within the grand unification framework

Understand

We demonstrate viability of the one-loop neutrino mass mechanism within the framework of grand unification when the loop particles comprise scalar leptoquarks (LQs) and quarks of the matching electric charge.

• This mechanism can be implemented in both supersymmetric and non-supersymmetric models and requires the presence of at least one LQ pair.
• The appropriate pairs for the neutrino mass generation via the up-type and down-type quark loops are $S_3$-$R_2$ and $S_{1,\,3}$-$\tilde{R}_2$, respectively.
• We consider two phenomenologically distinct regimes for the LQ masses in our analysis.