/ Phenomenology-HEP arXiv:0704.0642

Direct photons and dileptons via color dipoles

Kopeliovich, B.Z. (Dubna, JINR) ; Rezaeian, A.H. (Santa Maria U., Valparaiso) ; Pirner, H.J. (Heidelberg U.) ; Schmidt, I. (Santa Maria U., Valparaiso)

Published in: Phys.Lett.
Year: 2007
Vol.: B653
Page No: 210-215
Pages: 6

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.

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