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Cited by 206

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Gravitino production from heavy moduli decay and cosmological moduli problem revived

Open access
Nakamura, Shuntaro, Yamaguchi, Masahiro·2006·Physics Letters B

Abstract

The cosmological moduli problem for relatively heavy moduli fields is reinvestigated. For this purpose we examine the decay of a modulus field at a quantitative level. The modulus dominantly decays into gauge bosons and gauginos, provided that the couplings among them are not suppressed in the gauge kinetic function. Remarkably the modulus decay into a gravitino pair is unsuppressed generically, with a typical branching ratio of order 0.01. Such a large gravitino yield after the modulus decay causes cosmological difficulties. The constraint from the big-bang nucleosynthesis pushes up the gravitino mass above 105GeV. Furthermore to avoid the over-abundance of the stable neutralino lightest superparticles (LSPs), the gravitino must weigh more than about 106GeV for the wino-like LSP, and even more for other neutralino LSPs. This poses a stringent constraint on model building of low-energy supersymmetry.

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Crossref · 10.1016/j.physletb.2006.05.078

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Metadata

Authors
Nakamura, S., & Yamaguchi, M.
Venue
Physics Letters B
Publisher
Elsevier BV
Published
2006-07
Volume
638
Issue
5-6
Pages
389-395
ISSN
0370-2693 (ISSN-L)
OpenAlex
W2077458907
Cited by
206
References
1
FWCI
12.49
Type
journal article
Language
en
Open access
hybrid

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