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Examination of direct-photon and pion production in proton-nucleon collisions

L. Apanasevich, M. Begel, C. Bromberg, T. Ferbel, G. Ginther, J. Huston, S. E. Kuhlmann, P. Slattery, M. Zielinski, V. Zutshi

hep-pharXiv:hep-ph/0007191

Abstract

We present a study of inclusive direct-photon and pion production in hadronic interactions, focusing on a comparison of the ratio of gamma/pi0 yields with expectations from next-to-leading order perturbative QCD (NLO pQCD). We also examine the impact of a phenomenological model involving kT smearing (which approximates effects of additional soft-gluon emission) on absolute predictions for photon and pion production and their ratio.

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