Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of proton parton distribution functions at high x   At large values of $x$ the parton distribution functions (PDFs) of the proton
are poorly constrained and there are considerable variations between different
global fits. Data at such high $x$ have already been published by the ZEUS
Collaboration, but not yet used in PDF extractions. A technique for comparing
predictions based on different PDF sets to the observed number of events in the
ZEUS data is presented. It is applied to compare predictions from the most
commonly used PDFs to published ZEUS data at high Bjorken $x$. A wide variation
is found in the ability of the PDFs to predict the observed results. A scheme
for including the ZEUS high $x$ data in future PDF extractions is discussed.

23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat