Gauge-invariant multipole expansion scheme for heavy-quark systems in quantum chromodynamics

1 March 1981

journal article
research article
Published by American Physical Society (APS) in Physical Review D

Vol. 23 (5) , 1180-1193
https://doi.org/10.1103/physrevd.23.1180

Abstract

Separation of short-distance and long-distance dynamics for heavy-quark-antiquark systems interacting with color gluons is investigated through a classification of gluons according to their ranges. A gauge-invariant double multipole expansion scheme is constructed which takes into account color fluctuation of heavy-quark systems. Hadronic transitions between heavy-quark—antiquark bound states as well as the static quark-antiquark potential are studied within this framework.

Keywords

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