Monday, September 10, 2012

1209.1614 (Giovanni Antonio Chirilli)

High-Energy QCD factorization from DIS to pA collisions    [PDF]

Giovanni Antonio Chirilli
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.
View original: http://arxiv.org/abs/1209.1614

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