Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Polarizations of J/psi and psi(2S) Mesons Produced in ppbar Collisions
  at 1.96 TeV   We have measured the polarizations of $\jpsi$ and $\psiprime$ mesons as
functions of their transverse momentum $\pt$ when they are produced promptly in
the rapidity range $|y|<0.6$ with $\pt \geq 5 \pgev$. The analysis is performed
using a data sample with an integrated luminosity of about $800 \ipb$ collected
by the CDF II detector. For both vector mesons, we find that the polarizations
become increasingly longitudinal as $\pt$ increases from 5 to $30 \pgev$. These
results are compared to the predictions of nonrelativistic quantum
chromodynamics and other contemporary models. The effective polarizations of
$\jpsi$ and $\psiprime$ mesons from $B$-hadron decays are also reported.

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The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys
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The categories of this paper are: funct-an
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
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The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org