Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quarkonium polarization as a test of non-relativistic effective theory   I compare current approaches to quarkonium production with regard to what
they tell us about quarkonium polarization. Predictions for $J/\psi$
polarization in hadron-hadron and photon-hadron collisions are summarized.

34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess