Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Is J/psi-Nucleon Scattering Dominated by the Gluonic van der Waals
  Interaction?   The gluon-exchange contribution to $J/\psi$-nucleon scattering is shown to
yield a sizeable scattering length of about -0.25 fm, which is consistent with
the sparse available data. Hadronic corrections to gluon exchange which are
generated by $\rho\pi$ and $D\bar D$ intermediate states of the $J/\psi$ are
shown to be negligible. We also propose a new method to study $J/\psi$-nucleon
elastic scattering in the reaction $\pi^+ d\to J/\psi p p$.

25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an