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

Journal of High Energy Physics Springer Berlin Heidelberg 2015:9 (2015)

Authors:

H Abramowicz, I Abt, L Adamczyk, M Adamus, V Andreev, S Antonelli, V Aushev, Y Aushev, A Baghdasaryan, K Begzsuren, O Behnke, U Behrens, A Belousov, A Bertolin, I Bloch, EG Boos, K Borras, V Boudry, G Brandt, V Brisson, D Britzger, I Brock, NH Brook, R Brugnera, A Bruni, A Buniatyan, PJ Bussey, A Bylinkin, L Bystritskaya, A Caldwell, AJ Campbell, KB Cantun Avila, M Capua, CD Catterall, F Ceccopieri, K Cerny, V Chekelian, J Chwastowski, J Ciborowski, R Ciesielski, JG Contreras, AM Cooper-Sarkar, M Corradi, F Corriveau, J Cvach, JB Dainton, K Daum, RK Dementiev, RCE Devenish, C Diaconu

Abstract:

H1 and ZEUS have published single-differential cross sections for inclusive D∗±-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 Q2> 5 GeV2, electron inelasticity 0.02 < y < 0.7 and the D∗± meson’s transverse momentum pT(D∗) > 1.5 GeV and pseudorapidity |η(D∗)| < 1.5. The combination procedure takes into account all correlations, yielding significantly reduced experimental uncertainties. Double-differential cross sections d2σ/dQ2dy are combined with earlier D∗± data, extending the kinematic range down to Q2> 1.5 GeV2. Perturbative next-to-leading-order QCD predictions are compared to the results.
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