Long-distance behavior of quark form factor in QCD
Phys. Rev. D 39, 953 – Published 1 February, 1989
DOI: https://doi.org/10.1103/PhysRevD.39.953
Abstract
We study the infrared behavior of the color-singlet quark form factor in perturbative QCD. We express the nonleading fourth-order contributions in terms of an infrared anomalous dimension, which characterizes the renormalization-group equation describing the long-distance behavior of the form factor. We discuss the important features of this function and comment on its behavior at high energy.