  We present a model for the formation of the charmed pentaquark Theta_c in
hard scattering processes such as deep inelastic scattering, e^+e^-
annihilation, and high-energy p pbar collisions. The model assumes that the
cross section for Theta_c formation is proportional to the rate of production
of p D^{*-} (or pbar D^{*+}) pairs in close proximity both in momentum space
and in coordinate space. The constant of proportionality is determined from the
Theta_c cross section in deep inelastic scattering as reported by the H1
experiment. The HERWIG Monte Carlo is used to generate simulated DIS events and
also to model the space-time structure of the final state. Requiring the proton
and the D^* be within a 100 MeV mass window and separated by a spacelike
distance of no more than 2 fm, we find that a large "coalescence enhancement
factor" F_co \sim 10 is required to account for the H1 signal. The same
approach is then applied in order to estimate the number and characteristics of
Theta_c events produced at LEP and the Tevatron.
