J/psi production via fragmentation at HERA

Details J/psi production via fragmentation at HERA J/psi production via fragmentation at HERA

1995-11-28

arxiv.org/abs/hep-ph/9511433v1

Phys.Lett. B373 (1996) 328-333

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages (Latex) plus 2 figures enclosed as a uuencoded file

Scientific paper

10.1016/0370-2693(96)00144-X

We compute the contributions to large-$p_T$ $J/\psi$ production at HERA coming from fragmentation of gluons and charm quarks. We find that the charm quark fragmentation contribution dominates over the direct production of $J/\psi$ via photon-gluon fusion at large-$p_T$, while the gluon fragmentation is negligibly small over the whole range of $p_T$. An experimental study of $p_T$ distributions of $J/\psi$ at HERA will provide a direct probe of the charm quark fragmentation functions.

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