Gravitino Dark Matter from Inflaton Decay

Details Gravitino Dark Matter from Inflaton Decay Gravitino Dark Matter from Inflaton Decay

2007-05-04

arxiv.org/abs/0705.0579v2

Phys.Lett.B660:100-106,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 3 figures. v2: references and figures added

Scientific paper

10.1016/j.physletb.2007.12.048

We discuss a scenario that gravitinos produced non-thermally by an inflaton decay constitute dark matter in the present universe. We find that this scenario is realized for wide ranges of the inflaton mass and the vacuum expectation value. What is intriguing about this scenario is that the gravitino dark matter can have a relatively large free streaming length at matter-radiation equality, which can be probed by future observation on QSO-galaxy strong lens system.

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