Meson Form Factors and Non-Perturbative Gluon Propagators

Details Meson Form Factors and Non-Perturbative Gluon Propagators Meson Form Factors and Non-Perturbative Gluon Propagators

2002-08-23

arxiv.org/abs/hep-ph/0208221v2

Phys.Rev. D67 (2003) 014014

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 7 figures. Discutions added, clarifing figures. Accepted to be published in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.67.014014

The meson (pion and kaon) form factor is calculated in the perturbative framework with alternative forms for the running coupling constant and the gluon propagator in the infrared kinematic region. These modified forms are employed to test the sensibility of the meson form factor to the nonperturbative contributions. Its is a powerful discriminating quantity and the results obtained with a particular choice of modified running coupling constant and gluon propagator have a good agreement with the available data, for both mesons, indicating the robustness of the method of calculation. Nevertheless, nonperturbative aspects may be included in the perturbative framework of calculation of exclusive processes.

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