Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: 3.5 keV x-ray line from decaying gravitino dark matter   Extremely weakly interacting particles like the gravitino may be stable
enough on cosmological time scales to constitute a good dark matter candidate
even in the presence of R-parity violation. We consider the possibility that
the recently identified 3.5 keV x-ray line can be generated in light gravitino
decays to neutrinos and photons. We find that this is indeed possible in loop
processes induced by trilinear lepton-number-violating couplings. We show that
in order to avoid overproduction of gravitinos, the reheating temperature has
to be at most around 100 GeV to 1 TeV. Finally we briefly discuss associated
LHC phenomenology due to a relatively light gluino and multijet/multilepton
events from R-parity violating decays of neutralinos.

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The categories of this paper are: astro-ph
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The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
28
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: hep-ex
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
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The categories of this paper are: supr-con
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The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
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The categories of this paper are: q-fin
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The categories of this paper are: q-alg
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The categories of this paper are: stat
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The categories of this paper are: hep-th