  The inclusive photoproduction of D\ast mesons and of D\ast-tagged dijets is
investigated with the H1 detector at the ep collider HERA. The kinematic region
covers small photon virtualities Q2 < 2 GeV2 and photon-proton centre-of-mass
energies of 100 < Wgp < 285 GeV. Inclusive D\ast meson differential cross
sections are measured for central rapidities |eta(D\ast)| < 1.5 and transverse
momenta pT (D\ast) > 1.8 GeV. The heavy quark production process is further
investigated in events with at least two jets with transverse momentum pT (jet)
> 3.5 GeV each, one containing the D\ast meson. Differential cross sections for
D\ast-tagged dijet production and for correlations between the jets are
measured in the range |eta(D\ast)| < 1.5 and pT (D\ast) > 2.1 GeV. The results
are compared with predictions from Monte Carlo simulations and next-to-leading
order perturbative QCD calculations.
