Thermal production of gravitinos

Details Thermal production of gravitinos Thermal production of gravitinos

2007-01-14

arxiv.org/abs/hep-ph/0701104v2

Phys.Rev.D75:075011,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

33 pages (long appendices), 12 figures. Final version to appear on PRD

Scientific paper

10.1103/PhysRevD.75.075011

We reconsider thermal production of gravitinos in the early universe, adding to previously considered 2 -> 2 gauge scatterings: a) production via 1 -> 2 decays, allowed by thermal masses; b) the effect of the top Yukawa coupling; c) a proper treatment of the reheating process. Our final result behaves physically (larger couplings give a larger rate) and is twice larger than previous results, implying e.g. a twice stronger constraint on the reheating temperature. Accessory results about (supersymmetric) theories at finite temperature and gravitino couplings might have some interest.

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