High-momentum asymptotics from the Fock-Feynman- Schwinger path integral

Details High-momentum asymptotics from the Fock-Feynman- Schwinger path integral High-momentum asymptotics from the Fock-Feynman- Schwinger path integral

1999-04-22

arxiv.org/abs/hep-ph/9904431v1

Phys.Lett. B464 (1999) 265-271

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, 15 pages, 3 figures

Scientific paper

10.1016/S0370-2693(99)00996-X

The asymptotics of n-point Green's function at large external momenta is obtained in the exponentiated form using the Fock-Feynman-Schwinger representation for propagators in the external field. The method is applied to gauge theories such as QCD and QED, and the Sudakov form-factor is calculated as an example in QED and meson form-factor in QCD. Nonperturbative contributions can be conveniently included, as it is demonstrated in the example of the confinement correction to the form-factor.

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