Abstract
A perturbative quantum-chromodynamics (QCD) analysis of heavy-quark production in hadron collisions is shown to account for the observed diffractive ..lambda../sup +//sub c/ production. The dominant graphs are flavor excitation by gluons (qc-bar..-->..qc-bar and gc-bar..-->..gc-bar) of charm. The source of the charm is QCD evolution of the structure functions of the incoming hadrons. Estimates are made for the ..lambda../sup 0//sub b/ cross section.
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