Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constraints on an Annihilation Signal from a Core of Constant Dark
  Matter Density around the Milky Way Center with H.E.S.S   An annihilation signal of dark matter is searched for from the central region
of the Milky Way. Data acquired in dedicated ON/OFF observations of the
Galactic center region with H.E.S.S. are analyzed for this purpose. No
significant signal is found in a total of $\sim 9$ h of ON/OFF observations.
Upper limits on the velocity averaged cross section, $<\sigma v >$, for the
annihilation of dark matter particles with masses in the range of $\sim 300$
GeV to $\sim 10$ TeV are derived. In contrast to previous constraints derived
from observations of the Galactic center region, the constraints that are
derived here apply also under the assumption of a central core of constant dark
matter density around the center of the Galaxy. Values of $<\sigma v >$ that
are larger than $3\cdot 10^{-24}\:\mathrm{cm^3/s}$ are excluded for dark matter
particles with masses between $\sim 1$ and $\sim 4$ TeV at 95% CL if the radius
of the central dark matter density core does not exceed $500$ pc. This is the
strongest constraint that is derived on $<\sigma v>$ for annihilating TeV mass
dark matter without the assumption of a centrally cusped dark matter density
distribution in the search region.

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The categories of this paper are: supr-con
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
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The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
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The categories of this paper are: nucl-th
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The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys