Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multiparton Tomography of Hot and Cold Nuclear Matter   Multiple parton interactions in relativistic heavy ion reactions result in
transverse momentum diffusion and medium induced non-Abelian energy loss of the
hard probes traversing cold and hot nuclear matter. A systematic study of the
interplay of nuclear effects on the $p_T \geq 2$ GeV inclusive hadron spectra
demonstrates that the competition between nuclear shadowing, multiple
scattering and jet quenching leads to distinctly different
enhancement/suppression of moderate and high-$p_T$ hadron production in $d+Au$
and $Au+Au$ collisions at RHIC. The associated increase of di-jet acoplanarity,
measured via the broadening of the back-to-back di-hadron correlation function,
provides an additional experimental tool to test the difference in the
dynamical properties of the media created in such reactions.

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The categories of this paper are: hep-th
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The categories of this paper are: cond-mat
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The categories of this paper are: supr-con
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The categories of this paper are: gr-qc
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The categories of this paper are: cs
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-alg
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The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
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The categories of this paper are: chem-ph
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The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
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The categories of this paper are: hep-ex
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The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
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The categories of this paper are: nlin