Color Evaporation Description of Inelastic Photo-Production of J/ψat HERA

Details Color Evaporation Description of Inelastic Photo-Production of J/ψat HERA Color Evaporation Description of Inelastic Photo-Production of J/ψat HERA

2002-11-11

arxiv.org/abs/hep-ph/0211161v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

2-column, six pages, Revtex4, uses epsfig.sty, 7 postscript figures

Scientific paper

10.1103/PhysRevD.67.054002

The H1 Collaboration recently reported a new analysis on the inelastic photo- production of J/\psi mesons at DESY HERA ep collider. We show that these new experimental results are well described by the Color Evaporation Model for quarkonium production. Moreover, this new data requires the introduction of resolved photon contributions in order to explain the results on small charmonium energy fraction, indicating that colored c \bar{c} pairs also contribute to the process.

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