Consistent Analysis of O(\alpha_s) Corrections to Pion Elastic Form Factor
High Energy Physics - Phenomenology
2014-11-17 v2
Abstract
We examine the role of O(\alpha_s) perturbative corrections to the pion elastic form factor F_\pi(Q^2). We express the quark current three-point function in terms of light cone variables and use Borel transformation to simultaneously model the Feynman mechanism contribution determined by the soft part of the pion light cone wave function and the hard term involving one gluon exchange. We find that for Q^2 \sim 5 GeV^2 the total one gluon exchange contribution may reach 40% of the soft contribution, even though its hard, factorization scale dependent part remains relatively small.
Cite
@article{arxiv.hep-ph/9708237,
title = {Consistent Analysis of O(\alpha_s) Corrections to Pion Elastic Form Factor},
author = {Adam Szczepaniak and Anatoly Radyushkin and Chueng-Ryong Ji},
journal= {arXiv preprint arXiv:hep-ph/9708237},
year = {2014}
}
Comments
15 pages; version to appear in Phys. Rev. D