Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hard Scattering in a Nuclear Environment: Farewell to Linear
  $k_{\perp}$-Factorization   We discuss a dramatic change brought into the pQCD description of hard
processes in a nuclear environment by a large thickness of heavy nuclei. It
breaks the familiar linear $k_{\perp}$-factorization which must be replaced by
a new concept of the nonlinear $k_{\perp}$-factorization introduced in
\cite{Nonlinear}.We demonstrate the salient features of nonlinear
$k_{\perp}$-factorization on several examples from hard dijet production in DIS
off heavy nuclei to single-jet to dijet production in hadron-nucleus collisions
>. We also comment briefly on the non-linear BFKL evolution for gluon density
of nuclei.

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The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
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The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
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The categories of this paper are: econ
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The categories of this paper are: eess
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
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The categories of this paper are: adap-org
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The categories of this paper are: math-ph
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The categories of this paper are: math
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph