Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $\Xi (1690)$ as a $\bar{K} \Sigma$ molecular state   We show that a $\Xi ^{\ast}$ pole can be dynamically generated near the
$\bar{K} \Sigma$ threshold as an $s$-wave $\bar{K} \Sigma$ molecular state in a
coupled-channels unitary approach with the leading-order chiral interaction.
This $\Xi ^{\ast}$ state can be identified with the $\Xi (1690)$ resonance with
$J^{P} = 1/2^{-}$. We find that the experimental $\bar{K}^{0} \Lambda$ and
$K^{-} \Sigma ^{+}$ mass spectra are qualitatively reproduced with the $\Xi
^{\ast}$ state. Moreover we theoretically investigate properties of the
dynamically generated $\Xi ^{\ast}$ state.

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The categories of this paper are: quant-ph
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The categories of this paper are: adap-org
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The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
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The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: physics
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The categories of this paper are: mtrl-th
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The categories of this paper are: comp-gas
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The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
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The categories of this paper are: stat
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The categories of this paper are: alg-geom