Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of Charm and Beauty Photoproduction at HERA using D* mu
  Correlations   A measurement of charm and beauty photoproduction at the electron proton
collider HERA is presented based on the simultaneous detection of a D*^{\pm}
meson and a muon. The correlation between the D* meson and the muon serves to
separate the charm and beauty contributions and the analysis provides
comparable sensitivity to both. The total and differential experimental cross
sections are compared to LO and NLO QCD calculations. The measured charm cross
section is in good agreement with QCD predictions including higher order
effects while the beauty cross section is higher.

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The categories of this paper are: acc-phys
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The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci