Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unstable Cold Dark Matter and the Cuspy Halo Problem in Dwarf Galaxies   We speculate that the dark halos of dwarf galaxies and low surface brightness
galaxies soften their central cusps by the decay of a fraction of cold dark
matter (CDM) particles to a stable particle with a recoiling velocity of a few
tens km s$^{-1}$, after they have driven the formation of galactic halos. This
process, however, does not necessarily produce a significant reduction of the
central dark matter density of satellite dwarf spheroidals like Draco or
Fornax. It is shown that the recovered distribution of concentration parameters
$c$ for the initial (before decay) Navarro-Frenk-White halos, is in good
agreement with CDM predictions. Other interesting potentials of unstable CDM
are highlighted.

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The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
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The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
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The categories of this paper are: comp-gas
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The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
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The categories of this paper are: alg-geom
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The categories of this paper are: stat
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga