A note on the moduli-induced gravitino problem

Details A note on the moduli-induced gravitino problem A note on the moduli-induced gravitino problem

2007-03-30

arxiv.org/abs/hep-ph/0703319v4

JHEP 0812:094,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, references added, identical to the published version

Scientific paper

10.1088/1126-6708/2008/12/094

The cosmological moduli problem has been recently reconsidered. Papers [1,2] show that even heavy moduli (m_\phi > 10^5 GeV) can be a problem for cosmology if a branching ratio of the modulus into gravitini is large. In this paper, we discuss the tachyonic decay of moduli into the Standard Model's degrees of freedom, e.g. Higgs particles, as a resolution to the moduli-induced gravitino problem. Rough estimates on model dependent parameters set a lower bound on the allowed moduli at around 10^8 ~ 10^9 GeV.

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