  In the hadroproduction of charm in the context of string fragmentation, the
pull of a beam remnant at the other end of a string may give a charm hadron
more energy than the perturbatively produced charm quark. The collapse of a
low-mass string to a single hadron is the extreme case in this direction, and
gives rise to asymmetries between charm and anticharm hadron spectra. We study
these phenomena, and develop models that describe the characteristics not only
of the charm hadrons but also of the associated event.
