Constraints on the Proton's Gluon Distribution from Prompt Photon Production

Details Constraints on the Proton's Gluon Distribution from Prompt Photon Production Constraints on the Proton's Gluon Distribution from Prompt Photon Production

1995-05-29

arxiv.org/abs/hep-ph/9505404v1

Nucl.Phys. B453 (1995) 334-354

Physics

High Energy Physics

High Energy Physics - Phenomenology

29 Pages, LaTeX, 9 figures

Scientific paper

10.1016/0550-3213(95)00424-Q

We analyze the capability of prompt photon production in pp and pp(bar) collisions to constrain the gluon distribution of the proton, considering data from fixed-target experiments as well as collider measurements. Combined fits are performed to these large-p_T direct gamma cross sections and lepton-proton deep-inelastic scattering data in the framework of next-to-leading order perturbative QCD. Special attention is paid to theoretical uncertainties originating from the scale dependence of the results and from the fragmentation contribution to the prompt photon cross section.

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