Combination and QCD analysis of charm and beauty production cross-section measurements in deep inelastic ep scattering at HERA

Measurements of open charm and beauty production cross sections in deep inelastic ep scattering at HERA from the H1 and ZEUS Collaborations are combined. Reduced cross sections are obtained in the kinematic range of negative four-momentum transfer squared of the photon 2.5 GeV 2 ≤ Q 2 ≤ 2000 GeV 2 a...

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Veröffentlicht in:	The European physical journal. C, Particles and fields Particles and fields, 2018-06, Vol.78 (6), p.1-32, Article 473
Hauptverfasser:	Abramowicz, H., Adamczyk, L., Aggarwal, R., Bertolin, A., Bolz, A., Boudry, V., Brisson, V., Britzger, D., Brock, I., Brugnera, R., Bruni, A., Caldwell, A., Avila, K. B. Cantun, Catterall, C. D., Cerny, K., Ciborowski, J., Cooper-Sarkar, A. M., Cvach, J., Dainton, J. B., Daum, K., Dementiev, R. K., Devenish, R. C. E., Diaconu, C., Dobre, M., Dusini, S., Egli, S., Favart, L., Feltesse, J., Fleischer, M., Garfagnini, A., Gogitidze, N., Golubkov, Yu. A., Gouzevitch, M., Grebenyuk, A., Grindhammer, G., Grzelak, G., Hladkỳ, J., Hochman, D., Huber, F., Iga, Y., Jacquet, M., Kananov, S., Kogler, R., Korzhavina, I. A., Kostka, P., Kretzschmar, J., Krüger, K., Krupa, B., Kuze, M., Lange, W., Laycock, P., Lebedev, A., Levy, A., Libov, V., Lipka, K., Lobodzinski, B., Makarenko, I., Martyn, H. -U., Maxfield, S. J., Mehta, A., Meyer, A. B., Meyer, H., Idris, F. Mohamad, Müller, K., Naumann, Th, Niebuhr, C., Nowak, G., Onderwaater, J., Patel, G. D., Pitzl, D., Raicevic, N., Reimer, P., Rizvi, E., Roosen, R., Rotaru, M., Ruspa, M., Sauter, M., Sefkow, F., Skillicorn, I. O., Słomiński, W., Solano, A., Soloviev, Y., Steder, M., Stefaniuk, N., Stella, B., Stern, A., Stopa, P., Tassi, E., Thompson, P. D., Tokushuku, K., Traynor, D., Tsurugai, T., Turcato, M., Van Mechelen, P., Vazdik, Y., Abdullah, W. A. T. Wan, Wünsch, E., Yamazaki, Y., Zawiejski, L., Zhautykov, B. O.
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomy Astrophysics and Cosmology Charm (particle physics) Elementary Particles Hadrons Heavy Ions High Energy Physics - Experiment High Energy Physics - Phenomenology Inelastic scattering Measurement Science and Instrumentation Momentum transfer Nuclear Energy Nuclear Physics Physics Physics and Astronomy Quantum Field Theories Quantum Field Theory Regular Article - Experimental Physics Scattering cross sections String Theory
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Zusammenfassung:	Measurements of open charm and beauty production cross sections in deep inelastic ep scattering at HERA from the H1 and ZEUS Collaborations are combined. Reduced cross sections are obtained in the kinematic range of negative four-momentum transfer squared of the photon 2.5 GeV 2 ≤ Q 2 ≤ 2000 GeV 2 and Bjorken scaling variable 3 · 10 - 5 ≤ x Bj ≤ 5 · 10 - 2 . The combination method accounts for the correlations of the statistical and systematic uncertainties among the different datasets. Perturbative QCD calculations are compared to the combined data. A next-to-leading order QCD analysis is performed using these data together with the combined inclusive deep inelastic scattering cross sections from HERA. The running charm- and beauty-quark masses are determined as m c ( m c ) = 1 . 290 - 0.041 + 0.046 ( exp / fit ) - 0.014 + 0.062 ( model ) - 0.031 + 0.003 ( parameterisation ) GeV and m b ( m b ) = 4 . 049 - 0.109 + 0.104 ( exp / fit ) - 0.032 + 0.090 ( model ) - 0.031 + 0.001 ( parameterisation ) GeV .
ISSN:	1434-6044 1434-6052
DOI:	10.1140/epjc/s10052-018-5848-3