Publication
Title
Instanton corrections to the quark form factor at large momentum transfer
Author
Abstract
 Within the Wilson integral formalism, we discuss the structure of nonperturbative corrections to the quark form factor at large momentum transfer analyzing the infrared renormalon and instanton effects. We show that the nonperturbative effects determine the initial value for the perturbative evolution of the quark form factor and attribute their general structure to the renormalon ambiguities of the perturbative series. It is demonstrated that the instanton contributions result in the finite renormalization of the next-to-leading perturbative result and numerically are characterized by a small factor reflecting the diluteness of the QCD vacuum within the instanton liquid model.
Language
English
Source (journal)
Physical review : D : particles and fields. - Lancaster, Pa, 1970 - 2003
Publication
Lancaster, Pa : 2003
ISSN
0556-2821
Volume/pages
67:11(2003), 7 p.
Article Reference
114017
ISI
000183915300032
Medium
E-only publicatie
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
 Faculty/Department Publication type Subject
External links
 Web of Science
Record
 Identification Creation 06.01.2015 Last edited 24.07.2017