J/psi production via fragmentation at HERA
Abstract
We compute the contributions to large-pT J/ 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/ via photon-gluon fusion at large-pT, while the gluon fragmentation is negligibly small over the whole range of pT. An experimental study of pT distributions of J/ at HERA will provide a direct probe of the charm quark fragmentation functions.
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