NLO evolution of color dipoles
Ian Balitsky, Giovanni A. Chirilli
TL;DR
This paper advances the understanding of small-x deep inelastic scattering by calculating the gluon contribution to the next-to-leading order evolution of Wilson-line operators, refining the BK equation.
Contribution
It provides the first calculation of the gluon contribution to NLO small-x evolution of Wilson lines, complementing previous quark contributions.
Findings
Gluon contribution to NLO evolution derived
Enhanced accuracy of the BK equation at NLO
Improved understanding of saturation effects
Abstract
The small- deep inelastic scattering in the saturation region is governed by the non-linear evolution of Wilson-line operators. In the leading logarithmic approximation it is given by the BK equation for the evolution of color dipoles. In the next-to-leading order the BK equation gets contributions from quark and gluon loops as well as from the tree gluon diagrams with quadratic and cubic nonlinearities. We calculate the gluon contribution to small-x evolution of Wilson lines (the quark part was obtained earlier).
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Taxonomy
TopicsBlack Holes and Theoretical Physics · Quantum Chromodynamics and Particle Interactions · High-Energy Particle Collisions Research