Principal-Value Resummation for Dilepton Production
Abstract
We present a new method of resummation of QCD threshold distributions to the hard scattering function of the dilepton production cross section in hadron-hadron collisions. Our formulation by-passes the infrared singularities of the QCD running coupling through a principal value prescription, and does not require an explicit infrared cut-off. The resulting large corrections exponentiate, and we discuss asymptotic properties of the exponent. We present a closed analytical formula for the resummed hard part in momentum space, and give predictions, at fixed-target energies, for the resulting cross section which is a bounded function of its kinematic variables in the entire partonic phase space.
Keywords
Cite
@article{arxiv.hep-ph/9408393,
title = {Principal-Value Resummation for Dilepton Production},
author = {H. Contopanagos and L. Alvero and G. Sterman},
journal= {arXiv preprint arXiv:hep-ph/9408393},
year = {2007}
}
Comments
LaTeX, 6 pages, style file and 1 uuencoded postscript figure are included (please follow instructions given at the beginning of the latex file), ANL-HEP-CP-94-53, ITP-SB-94-40