Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Studies of parton distributions at a neutrino factory   The determination of parton distribution functions in the nucleon and nuclei
is important for obtaining precise hadron-reaction cross sections, from which
any new exotic signature could be found. We show that a future neutrino factory
could provide important information on the parton distributions. First, a
recent effort concerning the parametrization of nuclear parton distributions is
explained. It suggests that the factory should be important for determining
unknown behavior of valence-quark distributions in nuclei at small $x$. Second,
the facility could be used for understanding nucleon spin structure and isospin
violation in the parton distributions.

18
The categories of this paper are: econ
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys