Pion form factors with improved infrared factorization

Authors
Stefanis, NG Schroers, W Kim, HC
Citation
Ng. Stefanis et al., Pion form factors with improved infrared factorization, PHYS LETT B, 449(3-4), 1999, pp. 299-305
Citations number
52
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS B
ISSN journal
03702693 → ACNP
Volume
449
Issue
3-4
Year of publication
1999
Pages
299 - 305
Database
ISI
SICI code
0370-2693(19990311)449:3-4<299:PFFWII>2.0.ZU;2-0
Abstract
We calculate electromagnetic pion form factors with an analytic model for a lpha(s)(Q(2)) which is infrared (LR) finite without invoking a "freezing" h ypothesis. We show that for the asymptotic pion distribution amplitude, F(p i)0(gamma)*(gamma) agrees well with the data, whereas the IR-enhanced hard contribution to F-pi and the soft (nonfactorizing) part can jointly account for the data. (C) 1999 Elsevier Science B.V. All rights reserved.