Evidence for Parton kT Effects in High pT Particle Production
High Energy Physics - Experiment
2009-04-17 v1 High Energy Physics - Phenomenology
Abstract
Inclusive pizero and direct-photon cross sections in the kinematic range 3.5 < pT < 12 GeV/c with central rapidities are presented for 530 and 800 GeV/c proton beams and a 515 GeV/c pi- beam incident on beryllium targets. Current Next-to-Leading-Order perturbative QCD calculations fail to adequately describe the data for conventional choices of scales. Kinematic distributions from these hard scattering events provide evidence that the interacting partons carry significant initial-state parton transverse momentum (kT). Incorporating these kT effects phenomenologically greatly improves the agreement between calculations and the measured cross sections.
Cite
@article{arxiv.hep-ex/9711017,
title = {Evidence for Parton kT Effects in High pT Particle Production},
author = {Fermilab E706 Collaboration and L. Apanasevich},
journal= {arXiv preprint arXiv:hep-ex/9711017},
year = {2009}
}
Comments
11 pages including 6 pages of figures with captions