Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Prompt Photon Plus Jet Photoproduction at HERA at Next-to-Leading Order
  in QCD   The cross section for photoproduction of an isolated prompt photon in
association with a jet is studied in Next-to-Leading Order. The kinematics are
those appropriate for the DESY $ep$ collider HERA. The effects on the cross
section of various experimental cuts including isolation cuts on the photon is
examined. Comparisons with the ZEUS preliminary data using two parametrizations
of the photon structure function is made, and good agreement is found. The data
is not yet precise enough to make a distinction between various models for the
photon structure function.

36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
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The categories of this paper are: acc-phys
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph