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arXiv · 1105.4155

Two-gluon correlations and initial conditions for small-x evolution

Adrian Dumitru·Jamal Jalilian-Marian·Elena Petreska
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Abstract

We derive the effective action of the hard large-x valence charges up to fourth order in their density. Such non-Gaussian weight functionals contribute at leading order in N_c to the connected two-gluon production diagrams which determine di-hadron correlations. The corresponding diagrams are not necessarily (highly) suppressed by the density of valence charges since their infrared divergences differ from those obtained in a Gaussian theory. Therefore, it appears prudent to include such higher dimensional operators when determining initial ensembles for JIMWLK evolution of higher n-point functions of Wilson lines.

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Adrian Dumitru, Jamal Jalilian-Marian, Elena Petreska. 2011-05-23. Two-gluon correlations and initial conditions for small-x evolution. https://doi.org/10.1103/physrevd.84.014018

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