Leptogenesis with TeV Scale Inverse Seesaw in SO(10)

TL;DR

This paper explores leptogenesis in a TeV-scale inverse seesaw model embedded in SO(10) symmetry, highlighting its viability and potential LHC accessibility of new gauge bosons, with distinctive decay and washout features.

Contribution

It demonstrates that successful leptogenesis constraints are weak in TeV-scale inverse seesaw models with SO(10), allowing for observable gauge bosons at colliders.

Findings

Leptogenesis is viable at TeV scale with inverse seesaw.

Extra gauge bosons W_R and Z' can be detected at LHC.

Inverse seesaw features larger decay rates and suppressed washout.

Abstract

We discuss leptogenesis within a TeV-scale inverse seesaw model for neutrino masses where the seesaw structure is guaranteed by an SO(10) symmetry. Contrary to the TeV-scale type-I gauged seesaw, the constraints imposed by successful leptogenesis in these models are rather weak and allow for the extra gauge bosons W_R and Z' to be in the LHC accessible range. The key differences in the inverse seesaw compared to the type I case are: (i) decay and inverse decay rates larger than the scatterings involving extra gauge bosons due to the large Yukawa couplings and (ii) the suppression of the washout due to very small lepton number breaking.