Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Diffractive Electromagnetic Processes from a Regge Point of View   The energy dependence of the cross sections for electromagnetic diffractive
processes can be well described by a single power, $W^\delta$. For $J/\psi$
photoproduction this holds in the range from 20 GeV to 2 TeV. This feature is
most easily explained by a single pole in the angular momentum plane which
depends on the scale of the process, at least in a certain range of values of
the momentum transfer. It is shown that this assumption allows a unified
description of all electromagnetic elastic diffractive processes. We also
discuss an alternative model with an energy dependent dipole cross section,
which is compatible with the data up to 2 TeV and which shows an energy
behaviour typical for a cut in the angular momentum plane.

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The categories of this paper are: solv-int
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The categories of this paper are: bayes-an
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The categories of this paper are: chem-ph
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The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
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The categories of this paper are: hep-lat
1
The categories of this paper are: cs
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The categories of this paper are: stat
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
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The categories of this paper are: mtrl-th
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The categories of this paper are: chao-dyn