Measurement of heavy-quark jet photoproduction at HERA

H. Abramowicz, Iris Abt, L. Adamczyk, M. Adamus, Ritu Aggarwal, S. Antonelli, P. Antonioli, А. Антонов, M. Arneodo, V. Aushev

90 more authors

Y. Aushev, O. Bachynska, A. Bamberger, A.N. Barakbaev, G. Barbagli, Giacomo Bari, Fernando Barreiro, N. Bartosik, D. Bartsch, M. Basile, O. Behnke, J. K. Behr, U. Behrens, L. Bellagamba, A. Bertolin, S. Bhadra, M. Bindi, C. Blohm, V. Bokhonov, T. Bołd, O. Bolilyi, Kyrylo Bondarenko, E. Boos, K. Borras, D. Boscherini, D. Bot, Ian C. Brock, E. Brownson, R. Brugnera, N.C. Brümmer, A. Bruni, G. Bruni, B. Brzozowska, Peter John Bussey, Ben Bylsma, Allen Christopher Caldwell, M. Capua, R. Carlin, C. D. Catterall, Sergei V. Chekanov, J. J. Chwastowski, J. Ciborowski, R. Ciesielski, L. Cifarelli, F. Cindolo, A. Contin, A. M. Cooper-Sarkar, N. Coppola, M. Corradi, F. Corriveau, M. Costa, G. D’Agostini, F. Dal Corso, J. Del Peso, R. K. Dementiev, S. De Pasquale, Malcolm Derrick, R.C.E. Devenish, D. Dobur, B. A. Dolgoshein, Ganna Dolinska, A. T. Doyle, V. Drugakov, L. S. Durkin, S. Dusini, Yael Eisenberg, P. Ermolov, A. Eskreys, S. Fang, Salvatore Fazio, J. Ferrando, M.I. Ferrero, J. Figiel, M. Forrest, Brian Foster, S. Fourletov, G. P. Gach, A. Galas, E. Gallo, A. Garfagnini, A. Geiser, Ioannis Gialas, L. K. Gladilin, D. Gladkov, Claudia Glasman, O. Gogota, Yu. A. Golubkov, P. Göttlicher, I. Grabowska-Bołd, J. Grebenyuk

2011

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DOI 10.1140/epjc/s10052-011-1659-5
Data confidence 70 medium
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Abstract

Photoproduction of beauty and charm quarks in events with at least two jets has been measured with the ZEUS detector at HERA using an integrated luminosity of 133 pb−1. The fractions of jets containing b and c quarks were extracted using the invariant mass of charged tracks associated with secondary vertices and the decay-length significance of these vertices. Differential cross sections as a function of jet transverse momentum, $p_{\mathrm {T}}^{\mathrm{jet}}$ , and pseudorapidity, η jet, were measured. The data are compared with previous measurements and are well described by next-to-leading-order QCD predictions.