Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Proton Structure from HERA to LHC   The kinematic region covered by the LHC experiments probes low values of
Bjorken-$x$. At the scale relevant for $W$ and $Z$ production the central
rapidity region covers $10^{-3} < x < 10^{-1}$. This means that it is the HERA
data which give the most insight into the behaviour of parton distribution
functions (PDFs) for the early phase of running at the LHC. The H1 and ZEUS
experiments are combining their data so as to provide a legacy of HERA results.
The present status of the data combinations and the impact of these data on our
knowledge of parton distribution functions is explored.

26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn