Direct photons and dileptons via color dipoles

Abstract

Drell-Yan dilepton pair production and inclusive direct photon production can be described within a unified framework in the color dipole approach. The inclusion of non-perturbative primordial transverse momenta and DGLAP evolution is studied. We successfully describe data for dilepton spectra from 800-GeV pp collisions, inclusive direct photon spectra for pp collisions at RHIC energies $\sqrt{s}=200$ GeV, and for $p\bar{p}$ collisions at Tevatron energies $\sqrt{s}=1.8$ TeV, in a formalism that is free from any extra parameters.

7 pages, 4 figures. Results unchanged, two new plots added to show (data-theory)/theory, NLO pQCD curve is added. To appear in PLB

References in corpus (1)

• Measurement of direct photon production in p + p collisions at sqrt(s) = 200 GeV

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