Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: PAMELA/Fermi-LAT electron cosmic ray spectrum at $\sim$100 GeV:
  implication for dark matter annihilation signal in accordance with the 130
  GeV $\gamma$-ray line   Recently, a tentative 130 GeV $\gamma$-ray line signal was identified by
quite a few groups. If correct it would constitute a ``smoking gun'' for dark
matter annihilations. Interestingly, the spectra of the cosmic ray electrons
detected by PAMELA and Fermi-LAT both show tiny wiggle-like structure at $\sim
100$ GeV, which might indicate a weak signal of the annihilation of $\sim 130$
GeV dark matter particles into electrons/positrons with a velocity-weighted
cross section $\langle\sigma v\rangle_{\rm \chi\chi\rightarrow e^{+}e^{-}} \sim
4\times10^{-26}~{\rm cm^{3}~s^{-1}}$. The prospect of identifying such a
potential weak dark-matter-annihilation electron and/or positron component by
AMS-02, a mission to measure the high energy cosmic ray spectra with
unprecedented accuracy, is investigated.

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The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
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The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
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The categories of this paper are: supr-con
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The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
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The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
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The categories of this paper are: patt-sol
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The categories of this paper are: solv-int
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The categories of this paper are: mtrl-th