Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $D^+D^-$ hadronic atom and its production in $pp$ and $p\bar{p}$
  collisions   There must be Coulomb bound states of a pair of hadrons, which are stable
against the strong interaction, with opposite electric charges. Such bound
states are hadronic atoms. We study the properties and the production of the
ground-state $D^+D^-$ hadronic atom $A_{D^+D^-}$, called dionium, with quantum
numbers $J^{PC}=0^{++}$. Using a nonrelativistic effective field theory for the
$D^0\bar{D}^0$-$D^+D^-$ coupled-channel system, the mass of the ground-state
dionium is predicted to be $(3739.3 \pm 0.1)~\text{MeV}$, with the binding
energy reduced by about 10% compared to the Coulomb binding energy due to the
strong interaction. Its width for the decay into the neutral $D^0\bar D^0$
channel is predicted to be $1.8^{+1.4}_{-0.6}$ keV using lattice inputs for the
$D\bar D$ strong interaction. The cross section for the inclusive prompt
production of the dionium at CMS and LHCb and that for the direct production
$p\bar p\to A_{D^+D^-}$ at PANDA are estimated at an order-of-magnitude level.
In particular, we expect that $\mathcal{O}(10^3\sim 10^5)$ events of the
reaction chain $p\bar p\to A_{D^+D^-}\to D^0\bar D^0 \to K^-\pi^+K^+\pi^-$ can
be collected at PANDA, and valuable information on the charmed meson
interaction and on understanding charmoniumlike states will be obtained.

29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph