Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New limits on light dark matter - proton cross section from the cosmic
  large-scale structure   We set the strongest limits to-date on the velocity-independent dark matter
(DM) - proton cross section $\sigma$ for DM masses $m = 10\,\mathrm{keV}$ to
$100\,\mathrm{GeV}$, using large-scale structure traced by the Lyman-alpha
forest: e.g., a 95% lower limit $\sigma < 6 \times 10^{-30}\,\mathrm{cm}^2$,
for $m = 100\,\mathrm{keV}$. Our results complement direct detection, which has
limited sensitivity to sub-GeV DM. We use an emulator of cosmological
simulations, combined with data from the smallest cosmological scales used
to-date, to model and search for the imprint of primordial DM-proton
collisions. Cosmological bounds are improved by up to a factor of 25.

36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat