Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Status of Molecules   This report summarizes the experimental and theoretical status of hadronic
molecules, which are weakly-bound states of two or more hadrons. We begin with
a brief history of the subject and discuss a few good candidates, and then
abstract some signatures for molecules which may be of interest in the
classification of possible molecule states. Next we argue that a more general
understanding of $2\to 2$ hadron-hadron scattering amplitudes will be crucial
for molecule searches, and discuss some of our recent work in this area. We
conclude with a discussion of a few more recent molecule candidates (notably
the $f_0(1710)$) which are not well established as molecules but satisfy some
of the expected signatures.

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The categories of this paper are: math
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The categories of this paper are: math-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-lat
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The categories of this paper are: quant-ph
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The categories of this paper are: q-fin
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The categories of this paper are: cond-mat
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The categories of this paper are: gr-qc
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The categories of this paper are: stat
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The categories of this paper are: acc-phys
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The categories of this paper are: astro-ph
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The categories of this paper are: physics
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The categories of this paper are: hep-th
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The categories of this paper are: atom-ph
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The categories of this paper are: funct-an