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Author Ellis, J. ♦ Jack, I. ♦ Jones, D. R. T. ♦ Karliner, Marek ♦ Samuel, Mark A.
Source arXiv.org
Content type Text
File Format PDF
Date of Submission 1997-10-09
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Physics
Subject Keyword High Energy Physics - Phenomenology ♦ physics:hep-ph
Abstract We use Asymptotic Pade Approximants (APAP's) to predict the four- and five-loop \beta-functions in QCD and N=1 supersymmetric QCD (SQCD), as well as the quark mass anomalous dimensions in Abelian and non-Abelian gauge theories. We show how the accuracy of our previous \beta-function predictions at the four-loop level may be further improved by using estimators weighted over negative numbers of flavours (WAPAP's). The accuracy of the improved four-loop results encourages confidence in the new five-loop \beta-function predictions that we present. However, the WAPAP approach does not provide improved results for the anomalous mass dimension, or for Abelian theories.
Description Reference: Phys.Rev.D57:2665-2675,1998
Educational Use Research
Learning Resource Type Article
Page Count 25


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