Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
1999-07-17
Phys.Lett.B462:440-452,1999
Physics
High Energy Physics
High Energy Physics - Experiment
19 pages, 4 figures, 1 table, submitted to Phys. Lett. B
Scientific paper
10.1016/S0370-2693(99)00906-5
High transverse momentum pi0-mesons have been measured with the H1 detector at HERA in deep-inelastic ep scattering events at low Bjorken-x, down to x <~ 4.10^{-5}. The measurement is performed in a region of small angles with respect to the proton remnant in the laboratory frame of reference, namely the forward region, and corresponds to central rapidity in the centre of mass system of the virtual photon and proton. This region is expected to be particularly sensitive to QCD effects in hadronic final states. Differential cross-sections for inclusive pi0-meson production are presented as a function of Bjorken-x and the four-momentum transfer Q^2, and as a function of transverse momentum and pseudorapidity. A recent numerical BFKL calculation and predictions from QCD models based on DGLAP parton evolution are compared with the data.
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