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.
Original languageEnglish
Article number014018
JournalPhysical Review D
Volume84
Issue number1
DOIs
Publication statusPublished - 14 Jul 2011

Bibliographical note

12 pages; v2: fixed layout

Keywords

  • hep-ph
  • nucl-th

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