Emergence of the NMSGUT

TL;DR

The paper introduces the NMSGUT, a minimal supersymmetric SO(10) GUT model that successfully fits fermion data, suppresses proton decay, and incorporates key features like dominant ${f{ar{126}}}$ Yukawa couplings and threshold effects.

Contribution

It presents the NMSGUT as a minimal, viable supersymmetric GUT model with specific Higgs content, capable of fitting fermion data and addressing proton decay constraints.

Findings

NMSGUT fits 18 fermion parameters with only 24 superpotential parameters.

Dominance of ${\bf{\bar{126}}}$ Yukawa couplings over ${\bf{10,120}}$.

Threshold effects raise baryon violation scales, suppressing proton decay.

Abstract

We trace the emergence of the ``New Minimal'' supersymmetric SO(10) GUT (NMSGUT) out of the debris created by our demonstration that the MSGUT is falsified by the data. The NMSGUT is based on ${\bf{210\oplus 10\oplus 120\oplus 126\oplus {\bar {126}}}}$ Higgs system. It has only spontaneous CP violation and Type I seesaw. With only 24 real superpotential parameters it is the simplest model capable of accommodating the known 18 parameter fermion mass data set and yet has enough freedom to accommodate the still unknown Leptonic CP violation and neutrino mass scale parameters. Our focus is on the two most salient features uncovered by our analysis: the domination of the ${\bf{\bar{126}}}$ Yukawa couplings by those of the ${\bf{10,120}}$ (required for evasion of the no-go that trapped the MSGUT) and the inescapable raising of the Baryon violation scales(and thus suppression of proton decay) decreed by a proper inclusion of the threshold effects associated with the calculated superheavy spectra. These two structural features are shown to be complementary.