Non-thermal Leptogenesis and a Prediction of Inflaton Mass in a Supersymmetric SO(10) Model

Abstract

The gravitino problem gives a severe constraint on the thermal leptogenesis scenario. This problem leads us to consider some alternatives to it if we try to keep the gravitino mass around the weak scale $m_{3/2}\sim 100$ GeV. We consider, in this paper, the non-thermal leptogenesis scenario in the framework of a minimal supersymmetric SO(10) model. Even if we start with the same minimal SO(10) model, we have different predictions for low-energy phenomenologies dependent on the types of seesaw mechanism. This is the case for leptogenesis: it is shown that the type-I see-saw model gives a consistent scenario for the non-thermal leptogenesis but not for type-II. The predicted inflaton mass needed to produce the observed baryon asymmetry of the universe is found to be $M_I\sim 5\times 10^{11}$ GeV for the reheating temperature $T_R=10^6$ GeV.

9 pages, 2 figures; the version to appear in JCAP

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Cited by in corpus (21)

• Novel Supersymmetric SO(10) Seesaw Mechanism
• Fermion masses and mixings in SO(10) models and the neutrino challenge to supersymmetric grand unified theories
• Intermediate mass scales in the non-supersymmetric SO(10) grand unification: a reappraisal
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• Evolution of the universe driven by a mass dimension one fermion field
• Reheating in small-field inflation on the brane: The Swampland Criteria and observational constraints in light of the PLANCK 2018 results
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• Leptogenesis in Realistic SO(10) Models
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