Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $Z_{cs}$ states from the $D^{*}_s \bar D^*$ and $J/\psi K^*$ coupled
  channels: Signal in $B^+ \to J/\psi \phi K^+$ decay   We study the $D^{*}_s \bar D^*$ system in connection with the $J/\psi K^*$ in
coupled channels and observe that, within reasonable values of the cut-off used
to regularize the loops, the system does not develop a bound state. However,
the $J^P = 2^+$ channel has enough attraction to create a strong cusp structure
that shows up in the $J/\psi K^+$ invariant mass distribution in the $B^+ \to
J/\psi \phi K^+$ decay at the $D^*_s \bar D^*$ threshold. Such structure is
visible in the experimental $B^+ \to J/\psi \phi K^+$ and $\bar B^0 \to J/\psi
K^+ K^-$ decays, with small statistics, and our results should stimulate
further measurements around this region, given the fact that cusp effects
provide as valuable information on hadron dynamics as resonances themselves.

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The categories of this paper are: cond-mat
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The categories of this paper are: nlin
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The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
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The categories of this paper are: cmp-lg
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The categories of this paper are: physics
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
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The categories of this paper are: hep-lat
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The categories of this paper are: q-fin
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The categories of this paper are: stat
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The categories of this paper are: hep-ex
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The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph