Abstract : 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.
F.D. Aaron, E. Barrelet, J.C. Bizot, V. Brisson, B. Delcourt, et al.. Measurement of Inclusive and Dijet D* Meson Cross Sections in Photoproduction at HERA. European Physical Journal C: Particles and Fields, EDP Sciences: EPJ, 2012, 72, pp.1995. <10.1140/epjc/s10052-012-1995-0>. <in2p3-00714739>