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  • Combination and QCD analysi...
    Aggarwal, R.; Alexa, C.; Antonioli, P.; Arneodo, M.; Bachynska, O.; Bartel, W.; Bartsch, D.; Basile, M.; Behrens, U.; Bertolin, A.; Brisson, V.; Bunyatyan, A.; Cantun Avila, K. B.; Ceccopieri, F.; Cerny, K.; Cifarelli, L.; Contreras, J. G.; Cooper-Sarkar, A. M.; Corradi, M.; D’Agostini, G.; Dainton, J. B.; Ermolov, P. F.; Eskreys, A.; Favart, L.; Ferencei, J.; Gallo, E.; Gladkov, D.; Glazov, A.; Göttlicher, P.; Grabowska-Bołd, I.; Grebenyuk, J.; Greenshaw, T.; Grindhammer, G.; Gueta, O.; Hain, W.; Hart, J. C.; Hladký, J.; Horisberger, R.; Ibrahim, Z. A.; Jakob, H.-P.; Januschek, F.; Jönsson, L.; Jung, A. W.; Khein, L. A.; Kondrashova, N.; Kostka, P.; Krämer, M.; Kretzschmar, J.; Libov, V.; Lipka, K.; Lohmann, W.; Long, K. R.; Margotti, A.; Marini, G.; Mattingly, M. C. K.; Meyer, H.; Mohamad Idris, F.; Monaco, V.; Moreau, F.; Morris, J. V.; Naumann, T.; Nobe, T.; Notz, D.; Nowak, R. J.; Nuncio-Quiroz, A. E.; Oh, B. Y.; Okazaki, N.; Papageorgiu, K.; Parenti, A.; Patel, G. D.; Piotrzkowski, K.; Pirumov, H.; Povh, B.; Radescu, V.; Rostovtsev, A.; Ruspa, M.; Schneekloth, U.; Schönberg, V.; Sciulli, F.; Singh, I.; Smith, W. H.; Son, D.; South, D.; Spiridonov, A.; Steder, M.; Stefaniuk, N.; Stifutkin, A.; Stopa, P.; Straumann, U.; Suszycki, L.; Szuba, J.; Szuba, D.; Tran, T. H.; Tseepeldorj, B.; Walczak, R.; Wan Abdullah, W. A. T.; Wolf, G.; Yoshida, R.; Žáček, J.; Zotkin, D. S.

    European physical journal. C, Particles and fields, 02/2013, Letnik: 73, Številka: 2
    Journal Article

    Measurements of open charm production cross sections in deep-inelastic ep scattering at HERA from the H1 and ZEUS Collaborations are combined. Reduced cross sections for charm production are obtained in the kinematic range of photon virtuality 2.5≤ Q 2 ≤2000 GeV 2 and Bjorken scaling variable 3⋅10 −5 ≤ x ≤5⋅10 −2 . The combination method accounts for the correlations of the systematic uncertainties among the different data sets. The combined charm data together with the combined inclusive deep-inelastic scattering cross sections from HERA are used as input for a detailed NLO QCD analysis to study the influence of different heavy flavour schemes on the parton distribution functions. The optimal values of the charm mass as a parameter in these different schemes are obtained. The implications on the NLO predictions for W ± and Z production cross sections at the LHC are investigated. Using the fixed flavour number scheme, the running mass of the charm quark is determined.