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arXiv · 1209.1614

High-Energy QCD factorization from DIS to pA collisions

Giovanni Antonio Chirilli
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Abstract

The high-energy QCD factorization for Deep Inelastic Scattering and for proton-nucleus collisions using Wilson line formalism and factorization in rapidity is discussed. We show that in DIS the factorization in rapidity reduces to the $k_{\rm T}$-factorization when the 2-gluon approximation is applied, provided that the composite Wilson line operator is used in the high-energy Operator Product Expansion. We then show that the inclusive forward cross-section in proton-nucleus collisions factorizes in parton distribution functions, fragmentation functions and dipole gluon distribution function at one-loop level.

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Giovanni Antonio Chirilli. 2012-09-07. High-Energy QCD factorization from DIS to pA collisions. https://doi.org/10.1142/s2010194512009245

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