Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Production and dilution of gravitinos by modulus decay   We study the cosmological consequences of generic scalar fields like moduli
which decay only through gravitationally suppressed interactions. We consider a
new production mechanism of gravitinos from moduli decay, which might be more
effective than previously known mechanisms, and calculate the final
gravitino-to-entropy ratio to compare with the constraints imposed by
successful big bang nucleosynthesis (BBN) etc., taking possible hadronic decays
of gravitinos into account. We find the modulus mass smaller than $\sim 10^4$
TeV is excluded. On the other hand, inflation models with high reheating
temperatures $T_{R,\rm inf} \sim 10^{16}$ GeV can be compatible with BBN thanks
to the late-time entropy production from the moduli decay if model parameters
are appropriately chosen.

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The categories of this paper are: atom-ph
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The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
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The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
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The categories of this paper are: q-alg
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The categories of this paper are: plasm-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
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The categories of this paper are: hep-th
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The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat