Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Coherent photoproduction of $J/\psi$ in nucleus-nucleus collisions in
  the color dipole approach   We investigate the exclusive photoproduction of $J/\psi$-mesons in
ultraperipheral heavy ion collisions in the color dipole approach. We first
test a number of dipole cross sections fitted to inclusive $F_2$-data against
the total cross section of exclusive $J/\psi$-production on the free nucleon.
We then use the color-dipole formulation of Glauber-Gribov theory to calculate
the diffractive amplitude on the nuclear target. The real part of the free
nucleon amplitude is taken into account consistent with the rules of Glauber
theory. We compare our results to recent published and preliminary data on
exclusive $J/\psi$ corrections in ultraperipheral lead-lead collisions at
$\sqrt{s_{NN}}=2.76 \, \rm{TeV}$ and $\sqrt{s_{NN}} = 5.02 \, \rm{TeV}$.
Especially at high $\gamma A$ energies there is room for additional shadowing
corrections, corresponding to triple-Pomeron terms or shadowing from large mass
diffraction.

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The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
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The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
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The categories of this paper are: atom-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: supr-con
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The categories of this paper are: plasm-ph
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The categories of this paper are: adap-org
2
The categories of this paper are: math