Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Studies of Charmonium-like States at BESIII   In the quark model, hadrons are dominantly bound states of quark-antiquark
pairs (mesons) or three quarks (baryons), but QCD also allows hadronic states
to be composed of more quarks bound together. Recently, BESIII, Belle and LHCb
have confirmed the existence of four-quark and pentaquark candidates. These new
states, along with experimentally observed resonances that do not fit well into
the charmonium and bottomonium spectra, present challenges and opportunities
for strong interaction theory. In this talk, I will review results on
charmonium-like exotic quark states that have been observed by the BESIII
experiment at the Beijing Electron Positron Collider II (BEPCII).

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The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: q-alg
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The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat