  Fully differential heavy quark contributions to the photon structure
functions in deeply inelastic scattering are computed in next-to-leading order
QCD, including both the direct and resolved contributions. A variety of
distributions are presented and discussed. Several of the distributions show
marked differences between the resolved and direct cases due primarily to the
presense of the gluon distribution in the former and lack thereof in the later.

High Energy Physics - Phenomenology