Perturbative QCD relations inspired by hypothetical tau leptons
Abstract
We review our recent works on tests of perturbative QCD, inspired by the relation between the hadronic decay of the tau lepton and the e+ e- annihilation into hadrons. First, we present a set of commensurate scale relations that probe the self-consistency of leading-twist QCD predictions for any observable which defines an effective charge. These tests are independent of the renormalization scheme and scale, and are applicable over wide data ranges. As an example we apply this approach to R_{e+ e-}. Second, using a differential form of these conmensurate scale relations, we present a method to measure the QCD Gell-Mann--Low Psi function.
Cite
@article{arxiv.hep-ph/9909311,
title = {Perturbative QCD relations inspired by hypothetical tau leptons},
author = {J. R. Pelaez and S. J. Brodsky and C. Merino and N. Toumbas},
journal= {arXiv preprint arXiv:hep-ph/9909311},
year = {2009}
}
Comments
To appear in the proceedings of the QCD 99 Euroconference, 7-13th July 1999 Montpellier, France 4 pages, uses espcrc2.sty (included)