The charm of gluon jets

We investigate the charm content of gluon jets in perturbative QCD. The cross section for g + g -> g + canti c is calculated for a non-vanishing c-quark mass. Multiplicities as well as energy spectra closely resemble those of 1Ssub(O) quarkonium decays to g + canti c, which can be presented in analytical form and thus provide a handy model adequate for charm production from gluon jets. The calculated rates are not quite as large suggested by a recent experimental analysis, and the energy distributions are falling less steeply. The characteristics of 3Psub(J) decays are distinctly different from S-wave decays. (orig.)