Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cosmological Moduli Problem in Gauge-mediated Supersymmetry Breaking
  Theories   A generic class of string theories predicts the existence of light moduli
fields, and they are expected to have masses $m_\phi$ comparable to the
gravitino mass $m_{3/2}$ which is in a range of $10^{-2}$keV--1GeV in
gauge-mediated supersymmetry breaking theories. Such light fields with weak
interactions suppressed by the Planck scale can not avoid some stringent
cosmological constraints, that is, they suffer from `cosmological moduli
problems'. We show that all the gravitino mass region $10^{-2}$keV $\lesssim
m_{3/2} \lesssim$ 1GeV is excluded by the constraints even if we incorporate a
late-time mini-inflation (thermal inflation). However, a modification of the
original thermal inflation model enables the region $10^{-2}$keV $\lesssim
m_{3/2} \lesssim$ 500keV to survive the constraints. It is also stressed that
the moduli can be dark matter in our universe for the mass region $10^{-2}$keV
$\lesssim m_\phi \lesssim$ 100keV.

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The categories of this paper are: plasm-ph
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The categories of this paper are: nlin
3
The categories of this paper are: physics
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The categories of this paper are: atom-ph
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The categories of this paper are: nucl-th
2
The categories of this paper are: math
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The categories of this paper are: ao-sci
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The categories of this paper are: comp-gas
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The categories of this paper are: gr-qc
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The categories of this paper are: dg-ga
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The categories of this paper are: quant-ph
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The categories of this paper are: q-fin
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The categories of this paper are: funct-an
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The categories of this paper are: cond-mat
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The categories of this paper are: chem-ph
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The categories of this paper are: stat