Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Low Energy INTEGRAL Positrons from eXciting Dark Matter   The origin of the e^+e^- 511 keV line observed by INTEGRAL remains unclear.
The rate and morphology of the signal have prompted questions as to whether
dark matter could play a role. We explore the case of dark matter upscattering
in the framework of eXciting Dark Matter (XDM), where WIMPs \chi, interacting
through a new dark force, scatter into excited states \chi*, which subsequently
emit e^+e^- pairs when they de-excite. We numerically compute the cross
sections for two Yukawa-coupled DM particles upscattering into excited states,
specifically considering variations motivated by recent N-body simulations with
additional baryonic physics. We find that that l>0 components of the
partial-wave decomposition are often significant contributions to the total
cross section and that for reasonable ranges of parameters dark matter can
produce the ~10^43 e^+/s observed by INTEGRAL.

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The categories of this paper are: ao-sci
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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: nlin
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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: atom-ph
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The categories of this paper are: supr-con
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The categories of this paper are: hep-ex
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The categories of this paper are: eess
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The categories of this paper are: acc-phys
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The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-lat
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The categories of this paper are: cmp-lg
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The categories of this paper are: quant-ph