Lightcone expansion for a product of two gaugeinvariant currents in QCD
Abstract
A lightcone expansion for a product of two gaugeinvariant currents is obtained in quantum chromodynamics. The coefficient functions in the expansion are derived from the Green functions. This has resulted in the establishment of gauge invariance and in the possibility of estimating the coefficient functions in any order of the perturbation theory. A new way of presenting the most singular part of the expansion in gaugeinvariant form has been invented.
 Publication:

Nuclear Physics B
 Pub Date:
 January 1983
 DOI:
 10.1016/05503213(83)901852
 Bibcode:
 1983NuPhB.211...55K