Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-08-04
Phys.Rev. D57 (1998) 2813-2822
Physics
High Energy Physics
High Energy Physics - Phenomenology
15 pages; version to appear in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.57.2813
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.
Ji Chueng-Ryong
Radyushkin Anatoly
Szczepaniak Adam
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