Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Recent Results on High-Q2 Neutral and Charged Current Cross Sections at
  HERA   High-Q^2 NC and CC DIS cross sections have been measured by H1 and ZEUS at
HERA. Both NC and CC results based on data taken during the year 1994-2000 are
in good agreement with Standard Model expectations. The structure function xF_3
is extracted from the NC cross sections and the mass of the W propagator is
extracted from the CC cross sections. Valence quark distributions are derived
by means of an NLO QCD fit.

28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat