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

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

2011-05-20

arxiv.org/abs/1105.4155v2

Phys.Rev.D84:014018,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages; v2: fixed layout

Scientific paper

10.1103/PhysRevD.84.014018

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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