Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Diffractive J/$\psi$ production in Ultraperipheral AuAu Collisions at
  RHIC   We report on the first measurement of diffractive J/psi production in
Ultraperipheral Au+Au collisions at \sqrt{s_{NN}}=200 GeV.

18
The categories of this paper are: econ
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
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The categories of this paper are: hep-th
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The categories of this paper are: hep-lat
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The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys