Renormalization of parton quasi-distributions beyond the leading order: spacelike vs. timelike
V. M. Braun, K.G. Chetyrkin, Bernd A. Kniehl
Abstract
We argue that the renormalization factors for non-local quark-antiquark and gluon operators at space-like and time-like separations connected by a Wilson line coincide to all orders in perturbation theory. We calculate the anomalous dimensions and renormalization constants of quark-antiquark and gluon operators to three- and two-loop accuracy, respectively, and also compute vacuum expectation values of these operators to three-loop accuracy.
Topics & Concepts
RenormalizationPartonPhysicsPerturbation theory (quantum mechanics)QuarkParticle physicsGluonMathematical physicsRenormalization groupQuantum electrodynamicsLoop (graph theory)Perturbation (astronomy)MathematicsQuantum mechanicsCombinatoricsParticle physics theoretical and experimental studiesQuantum Chromodynamics and Particle InteractionsHigh-Energy Particle Collisions Research