QCD at small x and nucleus-nucleus collisions

Details QCD at small x and nucleus-nucleus collisions QCD at small x and nucleus-nucleus collisions

2007-01-26

arxiv.org/abs/hep-ph/0701225v1

J.Phys.G34:S421-428,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

Plenary talk given at QM2006, Shanghai, November 2006. 8 pages, 8 figures

Scientific paper

10.1088/0954-3899/34/8/S30

At large collision energy sqrt(s) and relatively low momentum transfer Q, one expects a new regime of Quantum Chromo-Dynamics (QCD) known as "saturation". This kinematical range is characterized by a very large occupation number for gluons inside hadrons and nuclei; this is the region where higher twist contributions are as large as the leading twist contributions incorporated in collinear factorization. In this talk, I discuss the onset of and dynamics in the saturation regime, some of its experimental signatures, and its implications for the early stages of Heavy Ion Collisions.

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