PERTURBATIVE PION FORM-FACTOR REEXAMINED

Authors
Citation
D. Tung et Hn. Li, PERTURBATIVE PION FORM-FACTOR REEXAMINED, Zhongguo wuli xuekan, 35(6), 1997, pp. 651-662
Citations number
28
Language
INGLESE
art.tipo
Article
Journal title
ISSN journal
0577-9073
Volume
35
Issue
6
Year of publication
1997
Part
1
Pages
651 - 662
Database
ISI
SICI code
0577-9073(1997)35:6<651:PPFR>2.0.ZU;2-8
Abstract
We recalculate the pion electromagnetic form factor based on the pertu rbative QCD formalism that includes the Sudakov resummation. We take i nto account the evolution of the pion wave function in b, which repres ents the transverse extent of the pion. An infrared enhancement is obs erved when 1/b approaches Lambda(QCD). We propose to freeze the evolut ion of the wave function at some scale above Lambda(QCD), such that pe rturbative contributions are stablized. Our predictions are consistent with experimental data, and insensitive to the variation of relevant parameters.