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European Physical Journal C: Particles and Fields 72 (2012) 1995
Measurement of Inclusive and Dijet D* Meson Cross Sections in Photoproduction at HERA
F.D. Aaron, E. Barrelet1, J.C. Bizot2, V. Brisson2, B. Delcourt2, M. Jacquet2, C. Pascaud2, T.H. Tran2, Z. Zhang2, F. Zomer2, V. Boudry3, F. Moreau3, A. Specka3, M. Gouzevitch, C. Diaconu4, D. Hoffmann4, E. Sauvan5, C. Vallée4
For the H1 collaboration(s)
(2012)

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.
1:  LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
2:  LAL - Laboratoire de l'Accélérateur Linéaire
3:  LLR - Laboratoire Leprince-Ringuet
4:  CPPM - Centre de Physique des Particules de Marseille
5:  LAPP - Laboratoire d'Annecy le Vieux de Physique des Particules
Physics/High Energy Physics - Experiment
Fulltext link: 
http://fr.arXiv.org/abs/1203.1170