Principal-Value Resummation for Dilepton Production

Details Principal-Value Resummation for Dilepton Production Principal-Value Resummation for Dilepton Production

1994-08-30

arxiv.org/abs/hep-ph/9408393v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, 6 pages, style file and 1 uuencoded postscript figure are included (please follow instructions given at the beginning o

Scientific paper

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.

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