Publications by Roman Walczak

Combination of differential D*(+/-) cross-section measurements in deep-inelastic ep scattering at HERA

Journal of High Energy Physics Springer Berlin Heidelberg 2015 (2015)

S Mikocki, FM Idris, A Morozov, NM Nasir, K Mueller, V Myronenko, K Nagano, T Naumann, PR Newman, C Niebuhr, T Nobe, D Notz, G Nowak, RJ Nowak, JE Olsson, Y Onishchuk, D Ozerov, P Pahl, C Pascaud, GD Patel, E Paul, E Perez, W Perlanski, A Petrukhin, I Picuric

H1 and ZEUS have published single-differential cross sections for inclusive D<sup>∗±</sup>-meson production in deep-inelastic ep scattering at HERA from their respective final data sets. These cross sections are combined in the common visible phase-space region of photon virtuality Q<sup>2</sup>&gt; 5 GeV<sup>2</sup>, electron inelasticity 0.02 &lt; y &lt; 0.7 and the D<sup>∗±</sup> meson’s transverse momentum p<inf>T</inf>(D<sup>∗</sup>) &gt; 1.5 GeV and pseudorapidity |η(D<sup>∗</sup>)| &lt; 1.5. The combination procedure takes into account all correlations, yielding significantly reduced experimental uncertainties. Double-differential cross sections d<sup>2</sup>σ/dQ<sup>2</sup>dy are combined with earlier D<sup>∗±</sup> data, extending the kinematic range down to Q<sup>2</sup>&gt; 1.5 GeV<sup>2</sup>. Perturbative next-to-leading-order QCD predictions are compared to the results.

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