Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Studies of heavy flavour production and the hadronic final state in high
  energy ep collisions   An extract of recent results from the H1 and ZEUS Collaborations is shown.
Various properties of quantum chromo dynamics are investigated by studying the
details of the hadronic final state of high energy electron proton collisions
at HERA. The presented results include analyses of jet cross sections and
single particle production such as $\gamma$ and $D$. Part of the measurements
deal with final states involving identified heavy quarks (charm and beauty).

14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph