PION HELICITY STRUCTURE AND ITS CONSEQUENCES FOR THE HARD SCATTERING FORM-FACTOR

Authors
WANG SW KISSLINGER LS
Citation
Sw. Wang et Ls. Kisslinger, PION HELICITY STRUCTURE AND ITS CONSEQUENCES FOR THE HARD SCATTERING FORM-FACTOR, Physical review. D. Particles and fields, 54(9), 1996, pp. 5890-5893
Citations number
26
Categorie Soggetti
Physics, Particles & Fields
Journal title
Physical review. D. Particles and fields → ACNP
ISSN journal
05562821
Volume
54
Issue
9
Year of publication
1996
Pages
5890 - 5893
Database
ISI
SICI code
0556-2821(1996)54:9<5890:PHSAIC>2.0.ZU;2-C
Abstract
In a study of the elastic pion form factor for large momentum transfer s based on a modified perturbative QCD (PQCD) approach we have include d helicity components that are customarily neglected. Along with the i nclusion of transverse momentum, this gives a large suppression of the form factor from the prediction of the original hard scattering model based on PQCD in the Q(2) domain where experimental data are availabl e. We conclude that nonperturbative contributions will dominate in thi s region.