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

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arxiv hep-ph/0007191 v2 pith:XSHF7NZQ submitted 2000-07-18 hep-ph

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
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M. Zielinski V. Zutshi
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keywords pionproductiondirect-photonratioabsoluteadditionalapproximatescollisions
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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 k_T smearing (which approximates effects of additional soft-gluon emission) on absolute predictions for photon and pion production and their ratio.

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