Title
Instanton corrections to the quark form factor at large momentum transferInstanton corrections to the quark form factor at large momentum transfer
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Lancaster, Pa,
Subject
Physics
Source (journal)
Physical review : D : particles and fields. - Lancaster, Pa, 1970 - 2003
Volume/pages
67(2003):11, 7 p.
ISSN
0556-2821
1550-7998
Article Reference
114017
Carrier
E-only publicatie
Target language
English (eng)
Full text (Publishers DOI)
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.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/722cc6/8997.pdf
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