Measurement of inclusive and dijet D∗ meson cross sections in photoproduction at HERA
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- H1 Collaboration, Aaron, F.D., Alexa, C. et al. Eur. Phys. J. C (2012) 72: 1995. doi:10.1140/epjc/s10052-012-1995-0
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The inclusive photoproduction of D∗ mesons and of D∗-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<Wγp<285 GeV. Inclusive D∗ meson differential cross sections are measured for central rapidities |η(D∗)|<1.5 and transverse momenta pT(D∗)>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∗ meson. Differential cross sections for D∗-tagged dijet production and for correlations between the jets are measured in the range |η(D∗)|<1.5 and pT(D∗)>2.1 GeV. The results are compared with predictions from Monte Carlo simulations and next-to-leading order perturbative QCD calculations.