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Measurement of open beauty production in photoproduction at HERA

  • J. Breitweg
  • , S. Chekanov
  • , M. Derrick
  • , D. Krakauer
  • , S. Magill
  • , B. Musgrave
  • , A. Pellegrino
  • , J. Repond
  • , R. Stanek
  • , R. Yoshida
  • , M. C.K. Mattingly
  • , P. Antonioli
  • , G. Bari
  • , M. Basile
  • , L. Bellagamba
  • , D. Boscherini
  • , A. Bruni
  • , G. Bruni
  • , G. Cara Romeo
  • , L. Cifarelli
  • F. Cindolo, A. Contin, M. Corradi, S. de Pasquale, P. Giusti, G. Iacobucci, G. Levi, A. Margotti, T. Massam, R. Nania, F. Palmonari, A. Pesci, G. Sartorelli, A. Zichichi, G. Aghuzumtsyan, C. Amelung, I. Brock, K. Coböken, S. Goers, H. Hartmann, K. Heinloth, E. Hilger, P. Irrgang, H. P. Jakob, A. Kappes, U. F. Katz, R. Kerger, O. Kind, E. Paul, J. Rautenberg, H. Schnurbusch, A. Stifutkin, J. Tandler, K. C. Voss, A. Weber, H. Wieber, D. S. Bailey, O. Barret, N. H. Brook, J. E. Cole, B. Foster, G. P. Heath, H. F. Heath, S. Robins, E. Rodrigues, J. Scott, R. J. Tapper, M. Capua, A. Mastroberardino, M. Schioppa, G. Susinno, H. Y. Jeoung, J. Y. Kim, J. H. Lee, I. T. Lim, K. J. Ma, M. Y. Pac, A. Caldwell, W. Liu, X. Liu, B. Mellado, S. Paganis, S. Sampson, W. B. Schmidke, F. Sciulli, J. Chwastowski, A. Eskreys, J. Figiel, K. Klimek, K. Olkiewicz, K. Piotrzkowski, M. B. Przybycień, P. Stopa, L. Zawiejski, B. Bednarek, K. Jeleń, D. Kisielewska, A. M. Kowal, T. Kowalski, E. Rulikowska-Zarebska, L. Suszycki, D. Szuba, A. Kotanński, L. A.T. Bauerdick, U. Behrens, J. K. Bienlein, K. Borras, V. Chiochia, J. Crittenden, D. Dannheim, K. Desler, G. Drews, A. Fox-Murphy, U. Fricke, F. Goebel, P. Göttlicher, R. Graciani, T. Haas, W. Hain, G. F. Hartner, K. Hebbel, S. Hillert, W. Koch, U. Kötz, H. Kowalski, H. Labes, B. Löhr, R. Mankel, J. Martens, M. Martínez, M. Milite, M. Moritz, D. Notz, M. C. Petrucci, A. Polini, M. Rohde, A. A. Savin, U. Schneekloth, F. Selonke, M. Sievers, S. Stonjek, G. Wolf, U. Wollmer, C. Youngman, W. Zeuner, C. Coldewey, A. Lopez-Duran Viani, A. Meyer, S. Schlenstedt, P. B. Straub, G. Barbagli, E. Gallo, A. Parenti, P. G. Pelfer, A. Bamberger, A. Benen, N. Coppola, S. Eisenhardt, P. Markun, H. Raach, S. Wölfle, P. J. Bussey, M. Bell, A. T. Doyle, C. Glasman, S. W. Lee, A. Lupi, N. Macdonald, G. J. McCance, D. H. Saxon, L. E. Sinclair, I. O. Skillicorn, R. Waugh, B. Bodmann, N. Gendner, U. Holm, H. Salehi, K. Wick, A. Yildirim, T. Carli, A. Garfagnini, A. Geiser, I. Gialas, D. Kçira, R. Klanner, E. Lohrmann, R. Gonçalo, K. R. Long, D. B. Miller, A. D. Tapper, R. Walker, P. Cloth, D. Filges, T. Ishii, M. Kuze, K. Nagano, K. Tokushuku, S. Yamada, Y. Yamazaki, A. N. Barakbaev, E. G. Boos, N. S. Pokrovskiy, B. O. Zhautykov, S. H. Ahn, S. B. Lee, S. K. Park, H. Lim, D. Son, F. Barreiro, G. García, O. González, L. Labarga, J. del Peso, I. Redondo, J. Terrón, M. Vázquez, M. Barbi, F. Corriveau, S. Padhi, D. G. Stairs, M. Wing, T. Tsurugai, A. Antonov, V. Bashkirov, M. Danilov, B. A. Dolgoshein, D. Gladkov, V. Sosnovtsev, S. Suchkov, R. K. Dementiev, P. F. Ermolov, Y. A. Golubkov, I. I. Katkov, L. A. Khein, N. A. Korotkova, I. A. Korzhavina, V. A. Kuzmin, O. Y. Lukina, A. S. Proskuryakov, L. M. Shcheglova, A. N. Solomin, N. N. Vlasov, S. A. Zotkin, C. Bokel, M. Botje, N. Brümmer, J. Engelen, S. Grijpink, E. Koffeman, P. Kooijman, S. Schagen, A. van Sighem, E. Tassi, H. Tiecke, N. Tuning, J. J. Velthuis, J. Vossebeld, L. Wiggers, E. de Wolf, B. Bylsma, L. S. Durkin, J. Gilmore, C. M. Ginsburg, C. L. Kim, T. Y. Ling, S. Boogert, A. M. Cooper-Sarkar, R. C.E. Devenish, J. Grobe-Knetter, T. Matsushita, O. Ruske, M. R. Sutton, R. Walczak, A. Bertolin, R. Brugnera, R. Carlin, F. Dal Corso, S. Dusini, S. Limentani, A. Longhin, M. Posocco, L. Stanco, M. Turcato, L. Adamczyk, L. Iannotti, B. Y. Oh, J. R. Okrasiński, P. R.B. Saull, W. S. Toothacker, J. J. Whitmore, Y. Iga, G. D'Agostini, G. Marini, A. Nigro, C. Cormack, J. C. Hart, N. A. McCubbin, T. P. Shah, D. Epperson, C. Heusch, H. F.W. Sadrozinski, A. Seiden, R. Wichmann, D. C. Williams, I. H. Park, N. Pavel, H. Abramowicz, S. Dagan, A. Gabareen, S. Kananov, A. Kreisel, A. Levy, T. Abe, T. Fusayasu, T. Kohno, K. Umemori, T. Yamashita, R. Hamatsu, T. Hirose, M. Inuzuka, S. Kitamura, K. Matsuzawa, T. Nishimura, M. Arneodo, N. Cartiglia, R. Cirio, M. Costa, M. I. Ferrero, S. Maselli, V. Monaco, C. Peroni, M. Ruspa, R. Sacchi, A. Solano, A. Staiano, D. C. Bailey, C. P. Fagerstroem, R. Galea, T. Koop, G. M. Levman, J. F. Martin, A. Mirea, A. Sabetfakhri, J. M. Butterworth, C. Gwenlan, M. E. Hayes, E. A. Heaphy, T. W. Jones, J. B. Lane, B. J. West, J. Ciborowski, R. Ciesielski, G. Grzelak, R. J. Nowak, J. M. Pawlak, R. Pawlak, B. Smalska, T. Tymieniecka, A. K. Wróblewski, J. A. Zakrzewski, A. F. Zarnecki, M. Adamus, T. Gadaj, O. Deppe, Y. Eisenberg, L. K. Gladilin, D. Hochman, U. Karshon, W. F. Badgett, D. Chapin, R. Cross, C. Foudas, S. Mattingly, D. D. Reeder, W. H. Smith, A. Vaiciulis, T. Wildschek, M. Wodarczyk, A. Deshpande, S. Dhawan, V. W. Hughes, S. Bhadra, C. D. Catterall, W. R. Frisken, R. Hall-Wilton, M. Khakzad, S. Menary
  • Argonne National Laboratory
  • Andrews University
  • National Institute for Nuclear Physics
  • German Electron Synchrotron
  • University of Salerno
  • University of Bonn
  • CERN
  • Sparkasse Bonn
  • Aarhus University
  • University of Bristol
  • PPARC
  • University of Calabria
  • Chonnam National University
  • Dongshin University
  • Columbia University
  • Institute of Nuclear Physics
  • AGH University of Krakow
  • Jagiellonian University in Kraków
  • University of Saskatchewan
  • Netlife AG
  • University of Florence
  • University of Freiburg
  • University of Edinburgh
  • University of Glasgow
  • University of Hamburg
  • University of Crete
  • Imperial College London
  • Jülich Research Centre
  • High Energy Accelerator Research Organization, Institute of Particle and Nuclear Physics
  • The University of Tokyo
  • Ministry of Education and Science of the Republic of Kazakhstan
  • Korea University
  • Kyungpook National University
  • Universidad Autónoma de Madrid
  • McGill University
  • Meiji Gakuin University
  • Moscow Engineering Physics Institute
  • Loma Linda University Health
  • Lomonosov Moscow State University
  • University of Amsterdam
  • Ohio State University
  • University of Oxford
  • University of Padua
  • Pennsylvania State University
  • Polytechnic University Japan
  • University of Rome La Sapienza
  • STFC Rutherford Appleton Laboratory (RAL)
  • University of California at Santa Cruz
  • Seoul National University
  • University of Siegen
  • Tel Aviv University
  • Tokyo Metropolitan University
  • University of Turin
  • University of Eastern Piedmont
  • University of Toronto
  • University College London
  • University of Warsaw
  • Institute of Nuclear Chemistry and Technology, Warsaw
  • Weizmann Institute of Science
  • University of Wisconsin-Madison
  • University of Rochester
  • Yale University
  • York University Toronto

Research output: Contribution to journalArticlepeer-review

83 Scopus citations

Abstract

The production and semi-leptonic decay of heavy quarks have been studied in the photoproduction process e+p → e+ + dijet + e- + X with the ZEUS detector at HERA using an integrated luminosity of 38.5 pb-1. Events with photon-proton centre-of-mass energies, Wγp, between 134 and 269 GeV and a photon virtuality, Q2, less than 1 GeV2 were selected requiring at least two jets of transverse energy Ejet1(2) T > 7(6) GeV and an electron in the final state. The electrons were identified by employing the ionisation energy loss measurement. The contribution of beauty quarks was determined using the transverse momentum of the electron relative to the axis of the closest jet, prel T. The data, after background subtraction, were fit with a Monte Carlo simulation including beauty and charm decays. The measured beauty cross section was extrapolated to the parton level with the b quark restricted to the region of transverse momentum pb T > = 5 GeV and pseudorapidity |ηb| < 2. The extrapolated cross section is 1.6 ± 0.4 (stat.)+0.3 -0.5(syst.)+0.2 -0.4(ext.) nb. The result is compared to a perturbative QCD calculation performed to next-to-leading order.

Original languageEnglish
Pages (from-to)625-637
Number of pages13
JournalEuropean Physical Journal C
Volume18
Issue number4
DOIs
StatePublished - 2001

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