Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Impact of nuclear dependence of R=\sigma_L/\sigma_T on antishadowing in
  nuclear structure functions   We study the impact of the nuclear dependence of R=\sigma_L/\sigma_T on the
extraction of the F_2^A/F_2^D and F_1^A/F_1^D structure function ratios from
the data on the \sigma^A/\sigma^D cross section ratios. Guided by indications
of the nuclear dependence of R from the world data, we examine selected sets of
EMC, BCDMS, NMC and SLAC data and find that F_1^A/F_1^D < \sigma^A/\sigma^D
\leq F_2^A/F_2^D. In particular, we observe that the nuclear enhancement
(antishadowing) for F_1^A/F_1^D in the interval 0.1 < x < 0.3 becomes
significantly reduced or even disappears, which indicates that antishadowing is
dominated by the longitudinal structure function F_L. We also argue that
precise measurements of nuclear modifications of R and F_L^A have the potential
to constrain the poorly known gluon distribution in nuclei over a wide range of
x.

26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin