OPE coefficient functions in terms of composite operators only. Singlet case
High Energy Physics - Phenomenology
2013-05-30 v2 High Energy Physics - Theory
Abstract
A method for calculating coefficient functions of the operator product expansion, which was previously derived for the non-singlet case, is generalized for the singlet coefficient functions. The resulting formula defines coefficient functions entirely in terms of corresponding singlet composite operators without applying to elementary (quark and gluon) fields. Both "diagonal" and "non-diagonal" gluon coefficient functions in the product expansion of two electromagnetic currents are calculated in QCD. Their renormalization properties are studied.
Cite
@article{arxiv.1110.6059,
title = {OPE coefficient functions in terms of composite operators only. Singlet case},
author = {Alexander V. Kisselev},
journal= {arXiv preprint arXiv:1110.6059},
year = {2013}
}
Comments
33 pages, 15 figures, minor corrections are made