Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hidden and doubly heavy molecular states from interactions
  $D^{(*)}_{(s)}{\bar{D}}^{(*)}_{s}$/$B^{(*)}_{(s)}{\bar{B}}^{(*)}_{s}$ and
  ${D}^{(*)}_{(s)}D_{s}^{(*)}$/${B}^{(*)}_{(s)}B_{s}^{(*)}$   In this work, we perform a systematical investigation about the possible
hidden and doubly heavy molecular states with open and hidden strangeness from
interactions of $D^{(*)}{\bar{D}}^{(*)}_{s}$/$B^{(*)}{\bar{B}}^{(*)}_{s}$,
${D}^{(*)}_{s}{\bar{D}}^{(*)}_{s}$/${{B}}^{(*)}_{s}{\bar{B}}^{(*)}_{s}$,
${D}^{(*)}D_{s}^{(*)}$/${B}^{(*)}B_{s}^{(*)}$, and
$D_{s}^{(*)}D_{s}^{(*)}$/$B_{s}^{(*)}B_{s}^{(*)}$ in a quasipotential
Bethe-Salpeter equation approach. The interactions of the systems considered
are described within the one-boson-exchange model, which includes exchanges of
light mesons and $J/\psi/\Upsilon$ meson. Possible molecular states are
searched for as poles of scattering amplitudes of the interactions considered.
The results suggest that recently observed $Z_{cs}(3985)$ can be assigned as a
molecular state of $D^*\bar{D}_s+D\bar{D}^*_s$, which is a partner of
$Z_c(3900)$ state as a $D\bar{D}^*$ molecular state. The calculation also
favors the existence of hidden heavy states $D_s\bar{D}_s/B_s\bar{B}_s$ with
spin parity $J^P=0^+$, $D_s\bar{D}^*_s/B_s\bar{B}^*_s$ with $1^{+}$, and
$D^*_s\bar{D}^*_s/B^*_s\bar{B}^*_s$ with $0^+$, $1^+$, and $2^+$. In the doubly
heavy sector, the bound states can be found from the interactions
$(D^*D_s+DD^*_s)/(B^*B_s+BB^*_s)$ with $1^+$, $D_s\bar{D}_s^*/B_s\bar{B}_s^*$
with $1^+$, $D^*D^*_s/B^*B^*_s$ with $1^+$ and $2^+$, and
$D^*_sD^*_s/B^*_sB^*_s$ with $1^+$ and $2^+$. Some other interactions are also
found attractive, but may be not strong enough to produce a bound state. The
results in this work are helpful for understanding the $Z_{cs}(3985)$, and
future experimental search for the new molecular states.

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The categories of this paper are: cmp-lg
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The categories of this paper are: funct-an
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The categories of this paper are: ao-sci
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The categories of this paper are: cs
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The categories of this paper are: acc-phys
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The categories of this paper are: bayes-an
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The categories of this paper are: econ
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The categories of this paper are: nlin
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The categories of this paper are: nucl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-th
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The categories of this paper are: cond-mat
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The categories of this paper are: physics
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The categories of this paper are: chao-dyn
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The categories of this paper are: comp-gas
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The categories of this paper are: q-fin