Colour-Octet Contributions to J/psi Production via Fragmentation at HERA

1997/11/24 by Bernd A. Kniehl, Kniehl, Bernd A.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/9711443

3 pages (Latex), 2 figures (Postscript), to appear in the Proceedings of the International Europhysics Conference on High Energy Physics, Jerusalem, Israel, 19 - 26 August 1997

arxiv created 1997/11/24 · arxiv updated 2009/11/30

Abstract

We study J/psi photoproduction via fragmentation at next-to-leading order in the QCD-improved parton model, using the nonrelativistic factorization formalism proposed by Bodwin, Braaten, and Lepage. We predict that measurements of J/psi photoproduction at DESY HERA should show a distinctive excess over the expectation based on the colour-singlet model at small values of the inelasticity variable z.

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