Parton distribution function for topological charge at one loop

A bstract We present results for the gg -part of the one-loop corrections to the recently introduced “topological charge” GPD F ~ ( x, q 2 ). In particular, we give expression for its evolution kernel. To enforce strict compliance with the gauge invariance requirements, we have used on-shell states...

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Bibliographic Details
Published in:The journal of high energy physics 2022-02, Vol.2022 (2), p.163-15, Article 163
Main Authors: Radyushkin, Anatoly, Zhao, Shuai
Format: Article
Language:English
Subjects:
Classical and Quantum Gravitation
Distribution functions
Elementary Particles
Gauge invariance
Gauges
Gluons
High energy physics
Higher-Order Perturbative Calculations
Integrals
Light
Parton Distributions
Physics
Physics and Astronomy
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Regular Article - Theoretical Physics
Relativity Theory
String Theory
Topology
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Summary:A bstract We present results for the gg -part of the one-loop corrections to the recently introduced “topological charge” GPD F ~ ( x, q 2 ). In particular, we give expression for its evolution kernel. To enforce strict compliance with the gauge invariance requirements, we have used on-shell states for external gluons, and have obtained identical results both in Feynman and light-cone gauges. No “zero mode” δ ( x ) terms were found for the twist-4 gluon GPD F ~ ( x, q 2 ).
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP02(2022)163