The Color Glass Condensate formalism, Balitsky-JIMWLK evolution and Lipatov's high energy effective action

Abstract

We investigate the question whether Lipatov's high energy effective action is capable to reproduce quark and gluon propagators which resum interaction with a strong background field within high energy factorization. Such propagators are frequently employed in calculations within the Color Glass Condensate formalism, in particular when considering scattering of a dilute projectile on a dense target nucleus or nucleon. We find that such propagators can be obtained from the high energy effective action, if a special parametrization of the gluonic field is used, first proposed by Lipatov in the original publication on the high energy effective action. The obtained propagators are used to rederive from the high energy effective action the leading order Balitsky-JIMWLK evolution equation in covariant gauge. As an aside, our result confirms the definition of the reggeized gluon as the logarithm of an adjoint Wilson lines, proposed in the literature.

26 pages, 39 figures; typos corrected and references updated; agrees with version published in Physical Review D

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• Inclusive prompt photon production in electron-nucleus scattering at small x
• S-matrix and productions amplitudes in high energy QCD
• Unifying approaches: derivation of Balitsky hierarchy from the Lipatov effective action
• On correlators of Reggeon fields and operators of Wilson lines in high energy QCD
• Transverse Momentum Dependent Gluon Distribution within High Energy Factorization at Next-to-Leading Order
• High energy scattering in Einstein-Cartan gravity
• On QCD RFT corrections to the propagator of reggeized gluons
• Unequal rapidity correlators in the dilute limit of JIMWLK
• An effective field theory approach for electroweak interactions in the high energy limit
• Dijet impact factor in DIS at next-to-leading order in the Color Glass Condensate