TY - JOUR
T1 - Anti-screening by quarks and the structure of the inter-quark potential
AU - Bagan, Emili
AU - Lavelle, Martin
AU - McMullan, David
PY - 2006/1/26
Y1 - 2006/1/26
N2 - 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.
AB - 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.
UR - https://www.scopus.com/pages/publications/29844433557
U2 - 10.1016/j.physletb.2005.11.038
DO - 10.1016/j.physletb.2005.11.038
M3 - Article
SN - 0370-2693
VL - 632
SP - 652
EP - 656
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 5-6
ER -