Effects of Parton kt in High-pt Particle Production

Details Effects of Parton kt in High-pt Particle Production Effects of Parton kt in High-pt Particle Production

1998-11-09

arxiv.org/abs/hep-ph/9811278v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk given at Hadron Structure '98, Stara Lesna, September 7-13, 1998; to be published in the conference Proceedings. The subm

Scientific paper

We report on recent work concerning the phenomenology of initial-state parton-kt effects in direct-photon production and related processes in hadron collisions. After a brief summary of a kt-smearing model, we present a study of recent results on fixed-target and collider direct-photon production, using complementary data on diphoton and pion production that provide empirical guidance on the required amount of kt broadening. This approach provides a consistent description of the observed deviations of next-to-leading order QCD calculations relative to the inclusive direct-photon and pizero data. We also comment on the implications of these results for the extraction of the gluon distribution of the nucleon.

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