A note on the moduli-induced gravitino problem
Natalia Shuhmaher; Natalia Shuhmaher; Department of Physics, McGill University, Montréal, QC, H3A 2T8, Canadaand Département de Physique Théorique, Université de Genéve, 24 Ernest Ansermet, 1211 Genéve 4, Switzerland
Журнал:
Journal of High Energy Physics
Дата:
2008-12-01
Аннотация:
The cosmological moduli problem has been recently reconsidered. Papers [1, 2] show that even heavy moduli (m<sub>φ</sub>>10<sup>5</sup> 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<sup>8</sup> ∼ 10<sup>9</sup> GeV.
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