Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Parton Densitites at High-x   Reliable knowledge of parton distributions at large x is crucial for many
searches for new physics signals in the next generation of collider
experiments. Although these are generally well determined in the small and
medium x range, it has been shown that their uncertainty grows rapidly for
x>0.1. We examine the status of the distributions in light of new questions
that have been raised about "large-x" parton distributions, as well as recent
measurements which have improved the parton uncertainties.

37
The categories of this paper are: supr-con
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
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The categories of this paper are: funct-an
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-ex
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The categories of this paper are: nucl-ex
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The categories of this paper are: stat
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The categories of this paper are: cond-mat
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The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
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The categories of this paper are: eess
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The categories of this paper are: comp-gas