Low-Energy Thermal Leptogenesis in an Extended NMSSM Model

Details Low-Energy Thermal Leptogenesis in an Extended NMSSM Model Low-Energy Thermal Leptogenesis in an Extended NMSSM Model

2006-11-20

arxiv.org/abs/hep-ph/0611257v1

J.Phys.G34:741-752,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, revtex, 9 eps figures

Scientific paper

10.1088/0954-3899/34/4/010

Thermal leptogenesis in the canonical seesaw model in supersymmetry suffers from the incompatibility of a generic lower bound on the mass scale of the lightest right-handed neutrino and the upper bound on the reheating temperature of the Universe after inflation. This is resolved by adding an extra singlet superfield, with a discrete $Z_2$ symmetry, to the NMSSM (Next to Minimal Supersymmetric Standard Model). This generic mechanism is applicable to any supersymmetric model for lowering the scale of leptogenesis.

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