Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-03-06
Nucl.Phys. A775 (2006) 69-88
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 pages
Scientific paper
10.1016/j.nuclphysa.2006.06.002
We discuss the high-energy evolution equation in Quantum Chromodynamics (QCD) in the framework of the color glass condensate. We rewrite the generating functional of QCD with the color glass condensate into a representation with the density of states and a simple eikonal coupling. In this representation we introduce an auxiliary variable which is identified as the quantum color charge density consistent with non-commutativity in the operator formalism. We revisit the derivation of the Jalilian-Marian-Iancu-McLerran-Weigert-Leonidov-Kovner (JIMWLK) equation to clarify how the non-commutative nature among the color charge density operators can be disregarded in the regime where the gluon density is high.
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