Leptogenesis with TeV Scale Inverse Seesaw in SO(10)

Details Leptogenesis with TeV Scale Inverse Seesaw in SO(10) Leptogenesis with TeV Scale Inverse Seesaw in SO(10)

2010-10-07

arxiv.org/abs/1010.1471v2

Phys.Rev.D82:115025,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

References and a few comments added, improved figures; version to be published in PRD

Scientific paper

10.1103/PhysRevD.82.115025

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.

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