Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Probing the Dark Sector with Dark Matter Bound States   A model of dark sector where $O({\rm few~GeV})$ mass dark matter particles
$\chi$ couple to a lighter dark force mediator $V$, $m_V \ll m_\chi$, is
motivated by the recently discovered mismatch between simulated and observed
shapes of galactic haloes. Such models, in general, provide a challenge for
direct detection efforts and collider searches. We show that for a large range
of coupling constants and masses, the production and decay of the bound states
of $\chi$, such as $0^{-+}$ and $1^{--}$ states, $\eta_D$ and $ \Upsilon_D$, is
an important search channel. We show that $e^+e^-\to \eta_D +V$ or $\Upsilon_D
+\gamma$ production at $B$-factories for $\alpha_D > 0.1$ is sufficiently
strong to result in multiple pairs of charged leptons and pions via $\eta_D\to
2V \to 2(l^+l^-)$ and $\Upsilon_D\to 3V \to 3(l^+l^-)$ $(l=e,\mu,\pi)$. The
absence of such final states in the existing searches performed at \babar\ and
Belle sets new constraints on the parameter space of the model. We also show
that a search for multiple bremsstrahlung of dark force mediators, $e^+e^-\to
\chi\bar\chi+nV$, resulting in missing energy and multiple leptons, will
further improve the sensitivity to self-interacting dark matter.

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The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin