ARE IR RENORMALONS A GOOD PROBE FOR THE STRONG INTERACTION DOMAIN

Citation
Yl. Dokshitzer et Ng. Uraltsev, ARE IR RENORMALONS A GOOD PROBE FOR THE STRONG INTERACTION DOMAIN, Physics letters. Section B, 380(1-2), 1996, pp. 141-150
Citations number
15
Categorie Soggetti
Physics
Journal title
ISSN journal
03702693
Volume
380
Issue
1-2
Year of publication
1996
Pages
141 - 150
Database
ISI
SICI code
0370-2693(1996)380:1-2<141:AIRAGP>2.0.ZU;2-3
Abstract
We study the origin of non-analyticity in alpha(s) of a short-distance QCD observable to demonstrate that the infrared renormalons, the same -sign factorial growth of the perturbative expansion, is a universal p henomenon that originates entirely from the small coupling domain. In particular, both the position and the nature of the singularity of the Borel transform of the perturbative series prove to be independent of whether the running coupling alpha(k(2)) becomes singular at some fin ite scale (''Landau pole''), or stays finite down to k(2) = 0. We argu e that getting hold of the infrared renormalons per se can help next t o nothing in quantifying non-perturbative effects.