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Calculations in external fields in quantum chromodynamics. Technical review
Author(s) -
Novikov V. A.,
Shifman M. A.,
Vainshtein A. I.,
Zakharov V. I.
Publication year - 1984
Publication title -
fortschritte der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.469
H-Index - 71
eISSN - 1521-3978
pISSN - 0015-8208
DOI - 10.1002/prop.19840321102
Subject(s) - quantum chromodynamics , operator (biology) , point (geometry) , gluon , fock space , quark , physics , gauge (firearms) , quantum electrodynamics , field (mathematics) , theoretical physics , quantum field theory , particle physics , mathematical physics , quantum mechanics , mathematics , pure mathematics , history , biochemistry , chemistry , geometry , archaeology , repressor , transcription factor , gene
We review the technique of calculation of operator expansion coefficients. The main emphasis is put on gluon operators which appear in expansion of n ‐point functions induced by colourless quark currents. Two convenient schemes are discussed in detail: the abstract operator method and the method based on the Fock‐Schwinger gauge for the vacuum gluon field. We consider a large number of instructive examples important from the point of view of physical applications.