Asymptotic behavior of the Sudakov form factor

Abstract

The asymptotic behavior of the form factor in quantum electrodynamics is calculated in case the photon has a mass. The technique used takes into account all logarithms in ${q}^{2}$ but neglects inverse powers of ${q}^{2}$. The result is essentially that found by Sudakov. In order to obtain this result the large-$n$ behavior of ${\ensuremath{\gamma}}_{n}$ is obtained.