Anti-screening by quarks and the structure of the inter-quark potential

Emili Bagan, Martin Lavelle, David McMullan

Research output: Contribution to journalArticleResearchpeer-review

8 Citations (Scopus)


The inter-quark potential is dominated by anti-screening effects which underly asymptotic freedom. We calculate the order g6 anti-screening contribution from light fermions and demonstrate that these effects introduce a non-local divergence. These divergences are shown to make it impossible to define a coupling renormalisation scheme that renormalises this minimal, anti-screening potential. Hence the beta function cannot be divided into screening and anti-screening parts beyond lowest order. However, we then demonstrate that renormalisation can be carried out in terms of the anti-screening potential. © 2005 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)652-656
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number5-6
Publication statusPublished - 26 Jan 2006


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