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arXiv · 1108.4764

Renormalization group evolution of multi-gluon correlators in high energy QCD

Adrian Dumitru·Jamal Jalilian-Marian·Tuomas Lappi·Bjoern Schenke·Raju Venugopalan
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Abstract

Many-body QCD in leading high energy Regge asymptotics is described by the Balitsky-JIMWLK hierarchy of renormalization group equations for the x evolution of multi-point Wilson line correlators. These correlators are universal and ubiquitous in final states in deeply inelastic scattering and hadronic collisions. For instance, recently measured di-hadron correlations at forward rapidity in deuteron-gold collisions at the Relativistic Heavy Ion Collider (RHIC) are sensitive to four and six point correlators of Wilson lines in the small x color fields of the dense nuclear target. We evaluate these correlators numerically by solving the functional Langevin equation that describes the Balitsky-JIMWLK hierarchy. We compare the results to mean-field Gaussian and large N_c approximations used in previous phenomenological studies. We comment on the implications of our results for quantitative studies of multi-gluon final states in high energy QCD.

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Adrian Dumitru, Jamal Jalilian-Marian, Tuomas Lappi, Bjoern Schenke, Raju Venugopalan. 2011-08-24. Renormalization group evolution of multi-gluon correlators in high energy QCD. https://doi.org/10.1016/j.physletb.2011.11.002

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