Pion Helicity Structure And Its Consequence For The Hard Scattering Form Factor

Details Pion Helicity Structure And Its Consequence For The Hard Scattering Form Factor Pion Helicity Structure And Its Consequence For The Hard Scattering Form Factor

1996-08-07

arxiv.org/abs/hep-ph/9608252v1

Phys.Rev. D54 (1996) 5890-5893

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, Latex, 2 Postscript figures, uses epsf.sty. To appear in Phys. Rev. D54, 10/1/96

Scientific paper

10.1103/PhysRevD.54.5890

In a study of the elastic pion form factor for large momentum transfers based on a modified perturbative QCD (PQCD) approach we have included helicity components that are customarily neglected. Along with the inclusion 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 available. We conclude that nonperturbative contributions will dominate in this region.

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