Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Internal Bremsstrahlung Signature of Real Scalar Dark Matter and
  Consistency with Thermal Relic Density   A gamma-ray excess from the galactic center consistent with line emission
around 130 GeV was recently found in the Fermi-LAT data. Although the Fermi-LAT
Collaboration has not confirmed its significance, such a signal would be a
clear signature of Dark Matter annihilation. Until now, there have been many
attempts to explain the excess by Dark Matter. However these efforts tend to
give too-small cross sections into photons if consistency with the correct
thermal relic density of Dark Matter is required. In this letter, we consider a
simple Yukawa interaction that can be compatible with both aspects and show
which parameters are favored.

10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat