FRAGMENTATION PRODUCTION OF PSI/PSI AND PSI' AT THE TEVATRON

We present a calculation of the charm and gluon fragmentation contributions to inclusive J/psi and psi' production at large transverse momentum at the Tevatron. For psi production, we include both fragmentation directly into psi and fragmentation into chi(c) followed by the radiative decay chi(c) --> psi + gamma. We find that fragmentation overwhelms the leading-order mechanisms for prompt psi production at large p(T), and that the dominant contributions come from fragmentation into chi(c). Our results are consistent with recent data on psi production from the CDF and D0 experiments. In the case of prompt psi' production, the dominant mechanism at large p(T) is charm fragmentation into psi'. We find serious disagreement between our theoretical predictions and recent psi' data from the Tevatron.