Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Novel Aspects of Hard Diffraction in QCD   Initial- and final-state interactions from gluon-exchange, normally neglected
in the parton model have a profound effect in QCD hard-scattering reactions,
leading to leading-twist single-spin asymmetries, diffractive deep inelastic
scattering, diffractive hard hadronic reactions, and nuclear shadowing and
antishadowing--leading-twist physics not incorporated in the light-front
wavefunctions of the target computed in isolation. I also discuss the use of
diffraction to materialize the Fock states of a hadronic projectile and test
QCD color transparency.

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The categories of this paper are: cs
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The categories of this paper are: astro-ph
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The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
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The categories of this paper are: eess
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The categories of this paper are: dg-ga
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The categories of this paper are: alg-geom
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The categories of this paper are: solv-int
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The categories of this paper are: hep-lat
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The categories of this paper are: adap-org
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The categories of this paper are: chem-ph
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The categories of this paper are: physics
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The categories of this paper are: atom-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: stat
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The categories of this paper are: q-bio