We study the production asymmetry of charm versus anticharm mesons in photo
n-proton interactions. We consider photon-gluon fusion plus higher order co
rrections in which light quarks through vector meson-proton interactions co
ntribute to the cross section. Nonperturbative effects are included in term
s of a recombination mechanism which gives rise to a production asymmetry.
(C) 2001 Published by Elsevier Science B.V.