Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Neutralino Dark Matter from Heavy Gravitino Decay   We propose a new scenario of non-thermal production of neutralino cold dark
matter, in which the overproduction problem of lightest supersymmetric
particles (LSPs) in the standard thermal history is naturally solved. The
mechanism requires a heavy modulus field which decays mainly to ordinary
particles releasing large entropy to dilute gravitinos produced just after
inflation and thermal relics of LSPs. Significant amount of gravitinos are also
pair-produced at the decay, which subsequently decay into the neutralinos. We
identify the regions of the parameter space in which the requisite abundance of
the neutralino dark matter is obtained without spoiling the big-bang
nucleosynthesis by injection of hadronic showers from gravitino decay. The
neutralino abundance obtained in this mechanism is insensitive to the details
of the superparticle mass spectrum, unlike the standard thermal abundance. We
also briefly mention the testability of the scenario in future experiments.

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The categories of this paper are: cmp-lg
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The categories of this paper are: adap-org
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The categories of this paper are: atom-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: eess
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The categories of this paper are: stat
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The categories of this paper are: hep-lat
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The categories of this paper are: acc-phys
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The categories of this paper are: supr-con
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The categories of this paper are: ao-sci
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The categories of this paper are: plasm-ph
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The categories of this paper are: solv-int
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The categories of this paper are: math-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: chem-ph
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The categories of this paper are: chao-dyn