Proton decay suppression in a supersymmetric SO(10) model

Abstract

We propose a mechanism for sufficient suppression of dimension-5 operators for proton decay in a supersymmetric SO(10) model. This mechanism is analogue to the double seesaw mechanism in studying neutrino masses. Only an intermediate VEV instead of an intermediate scale is required so that gauge coupling unification is maintained. The VEV is generated by introducing an anomalous U(1) symmetry whose breaking is at higher scale. The proton decay amplitudes are suppressed by this VEV over the GUT scale. We use $\text{45+54}$ in breaking GUT symmetry. $\text{120}$ is included so that fermion sector is fully realistic. Assuming a minimal fine-tuning in the Higgs doublet sector, $\text{tan}\beta$ of order one is predicted.

Several small corrections, 13 pages, no figure

References in corpus (3)

• Different SO(10) Paths to Fermion Masses and Mixings
• Fermion masses and mixings in a renormalizable SO(10) x Z_2 GUT
• Connection between proton decay suppression and seesaw mechanism in supersymmetric SO(10) models

Cited by in corpus (1)

• Couplings in Renormalizable Supersymmetric SO(10) Models