Inflationary baryogenesis with low reheating temperature and testable neutron-antineutron oscillation

Details Inflationary baryogenesis with low reheating temperature and testable neutron-antineutron oscillation Inflationary baryogenesis with low reheating temperature and testable neutron-antineutron oscillation

2011-10-13

arxiv.org/abs/1110.2926v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 2 figures

Scientific paper

Recently we extended the standard model by four TeV-scale fields including a singlet fermion, an isotriplet and two isosinglet diquark scalars to generate the cosmological baryon asymmetry with an observable neutron-antineutron oscillation. We now supersymmetrize our model but do not constrain it at the TeV scale. The superpartner of the singlet fermion can serve as an inflaton field. Its three-body decays, mediated by the isosinglet diquarks and their superpartners, can simultaneously provide a low reheating temperature and a sizable CP asymmetry. We thus can realize a nonthermal baryogenesis without the gravitino problem. Meanwhile, we can have a testable neutron-antineutron oscillation induced by the exchange of one isosinglet and two isotriplet diquarks if the isotriplet diquark is at the TeV scale.

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