Publication
Title
Nonperturbative contribution to the quark form factor within the instanton model
Author
Abstract
The nonperturbative effects in the quark form factor are considered in the Wilson loop formalism, within the framework of the instanton liquid model. For the integration path corresponding to this form factor, the explicit expression for the vacuum expectation value of the Wilson operator is found to the leading order. It is shown that the instantons produce the power-like corrections to the perturbative result, which are comparable in magnitude with the perturbative part at the scale of order of the inverse average instanton size. It is demonstrated that the instanton contributions to the quark form factor are exponentiated to high orders in the small instanton density parameter.
Language
English
Source (journal)
European physical journal: A: hadrons and nuclei. - Berlin
Publication
Berlin : 2003
ISSN
1434-6001
Volume/pages
18:2-3(2003), p. 215-217
ISI
000186890000020
Full text (Publishers DOI)
Full text (publishers version - intranet only)
UAntwerpen
Faculty/Department
Publication type
Subject
External links
Web of Science
Record
Identification
Creation 06.01.2015
Last edited 22.05.2017