Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exotic quarkonium physics prospects at Belle II   The Belle II experiment at the SuperKEKB energy-asymmetric $e^+e^-$ collider
is a substantial upgrade of the B factory facility at KEK in Tsukuba, Japan. It
aims to record a factor of 50 times more data than its predecessor. The
experiment completed a commissioning run in 2018, and began full operation in
early 2019. Belle II is uniquely capable of studying the so-called XYZ
particles: heavy exotic hadrons consisting of more than three quarks. First
discovered by Belle, these now number in the dozens, and represent the
emergence of a new category within quantum chromodynamics. This talk will
present the prospects of Belle II to explore exotic quarkonium physics.

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The categories of this paper are: astro-ph
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The categories of this paper are: cs
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
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The categories of this paper are: alg-geom
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The categories of this paper are: q-fin
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The categories of this paper are: dg-ga
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-bio
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The categories of this paper are: nlin
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
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The categories of this paper are: chem-ph