Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Stringent Upper Limit on Dark Matter Self-Interaction Cross Section
  from Cluster Strong Lensing   We analyze strongly lensed images in 8 galaxy clusters to measure their dark
matter density profiles in the radial region between 10 kpc and 150 kpc, and
use this to constrain the self-interaction cross section of dark matter (DM)
particles. We infer the mass profiles of the central DM halos, bright central
galaxies, key member galaxies, and DM subhalos for the member galaxies for all
8 clusters using the Qlens code. The inferred DM halo surface densities are fit
to a self-interacting dark matter (SIDM) model, which allows us to constrain
the self-interaction cross section over mass $\sigma$/m. When our full method
is applied to mock data generated from two clusters in the Illustris-TNG
simulation, we find results consistent with no dark matter self-interactions as
expected. For the eight observed clusters with average relative velocities of
$1458_{-81}^{+80}$ km/s, we infer $\sigma$/m = $0.082_{-0.021}^{+0.027}$
cm$^2$/g and $\sigma$/m < 0.13 cm$^2$/g at the 95% confidence level.

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The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas