QCD Perturbation Theory at Low Energies

We apply the optimization procedure based on the Principle of Minimal Sensitivity to the third-order calculation of \(\R\). The effective couplant remains finite, freezing to a value \(\alpha_s/\pi = 0.26\) at low energies. Using Poggio-Quinn-Weinberg smearing we find good agreement between theory a...

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Bibliographic Details
Published in:arXiv.org 1992-07
Main Authors: Mattingly, A C, Stevenson, P M
Format: Article
Language:English
Subjects:
Freezing
Galling
Optimization
Perturbation theory
Online Access:Get full text
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Summary:We apply the optimization procedure based on the Principle of Minimal Sensitivity to the third-order calculation of \(\R\). The effective couplant remains finite, freezing to a value \(\alpha_s/\pi = 0.26\) at low energies. Using Poggio-Quinn-Weinberg smearing we find good agreement between theory and experiment right down to zero energy.
ISSN:2331-8422
DOI:10.48550/arxiv.9207228