Moduli-Induced Gravitino Problem

Details Moduli-Induced Gravitino Problem Moduli-Induced Gravitino Problem

2006-02-07

arxiv.org/abs/hep-ph/0602061v2

Phys.Rev.Lett.96:211301,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 1 figure. v2: minor changes, note added

Scientific paper

10.1103/PhysRevLett.96.211301

We investigate the cosmological moduli problem by studying a modulus decay in detail and find that the branching ratio of the gravitino production is generically of O(0.01-1), which causes another cosmological disaster. Consequently, the cosmological moduli problem cannot be solved simply by making the modulus mass heavier than 100 TeV. We also illustrate our results by explicitly calculating the branching ratio into the gravitinos in the mixed modulus--anomaly/KKLT- and racetrack-type models.

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