Combination of differential D∗± cross-section measurements in deep-inelastic ep scattering at HERA

H. Abramowicz, Iris Abt, L. Adamczyk, M. Adamus, V. Andreev, S. Antonelli, V. Aushev, Y. Aushev, A. Baghdasaryan, Khurelbaatar Begzsuren

99 more authors

O. Behnke, U. Behrens, A. Belousov, A. Bertolin, I. Bloch, E. Boos, K. Borras, V. Boudry, G. Brandt, V. Brisson, D. Britzger, Ian C. Brock, Nicholas H Brook, R. Brugnera, A. Bruni, Armen Bunyatyan, Peter John Bussey, A. Bylinkin, L. Bystritskaya, A. Caldwell, A. Campbell, K. B. Cantun Avila, M. Capua, C. D. Catterall, F. Ceccopieri, K. Černý, Vladimir Chekelian, J. J. Chwastowski, J. Ciborowski, R. Ciesielski, J.G. Contreras, A. M. Cooper-Sarkar, M. Corradi, F. Corriveau, J. Cvach, John B. Dainton, K. Daum, R. K. Dementiev, R.C.E. Devenish, CRISTINEL DIACONU, M. Dobre, Vitaliy Dodonov, Ganna Dolinska, S. Dusini, G. Eckerlin, S. Egli, E. E. Elsen, L. Favart, A. Fedotov, J. Feltesse, J. Ferencei, J. Figiel, M. Fleischer, A. M. Fomenko, Brian Foster, Erwin Gabathuler, G. P. Gach, E. Gallo, A. Garfagnini, J. Gayler, A. Geiser, S. Ghazaryan, A. Gizhko, L. K. Gladilin, L. Görlich, Nelly Gogitidze, Yu. A. Golubkov, M. Gouzevitch, Christoph Grab, A. Grebenyuk, J. Grebenyuk, T. Greenshaw, I. M. Gregor, Guenter Grindhammer, Grzegorz Grzelak, O. Gueta, M. P. Guzik, Dieter Haidt, W. Hain, R.C.W. Henderson, Jan Hladký, Don Hochman, Dirk Hoffmann, R. Hori, R. Horisberger, T. Hreus, F. Huber, Z. A. Ibrahim, Yoshihisa Iga, M. Ishitsuka, M. Kaur, Prabhdeep Kaur, E. ̃Tassi, P. Stopa, L. Zawiejski, M. Przybycień, Matthew Wing, Aleksander Filip Zarnecki, E. M. Lobodzinska

Journal of High Energy Physics, 2015

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DOI 10.1007/jhep09(2015)149
Data confidence 85 high
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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 Q 2 > 5 GeV2, electron inelasticity 0.02 < y < 0.7 and the D ∗± meson’s transverse momentum p T(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 d2 σ/dQ 2dy are combined with earlier D ∗± data, extending the kinematic range down to Q 2 > 1.5 GeV2. Perturbative next-to-leading-order QCD predictions are compared to the results.