Leptogenesis and fermion mass fit in a renormalizable $SO(10)$ model

Understand

A non-supersymmetric renormalizable $SO(10)$ model is investigated for its viability in explaining the observed fermion masses and mixing parameters along with the baryon asymmetry produced via thermal leptogenesis.

• The Yukawa sector of the model consists of complex $10_H$ and $\overline{126}_H$ scalars with a Peccei-Quinn like symmetry and it leads to strong correlations among the Yukawa couplings of all the standard model fermions including the couplings and masses of the right-handed (RH) neutrinos.
• The latter implies the necessity to include the second lightest RH neutrino and flavor effects for the precision computation of leptogenesis.
• We use the most general density matrix equations to calculate the temperature evolution of flavoured leptonic asymmetry.