Event shape analysis of deep inelastic scattering events with a large rapidity gap at HERA

J. Breitweg, M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. Repond, R. Stanek, R. L. Talaga, R. Yoshida, H. Zhang, M. C.K. Mattingly, F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. BruniG. Cara Romeo, G. Castellini, L. Cifarelli, F. Cindolo, A. Contin, M. Corradi, S. de Pasquale, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, F. Palmonari, A. Pesci, A. Polini, F. Ricci, G. Sartorelli, Y. Zamora Garcia, A. Zichichi, C. Amelung, A. Bornheim, I. Brock, K. Coböken, J. Crittenden, R. Deffner, M. Eckert, M. Grothe, H. Hartmann, K. Heinloth, L. Heinz, E. Hilger, H. P. Jakob, U. F. Katz, R. Kerger, E. Paul, M. Pfeiffer, C. Rembser, J. Stamm, R. Wedemeyer, H. Wieber, D. S. Bailey, S. Campbell-Robson, W. N. Cottingham, B. Foster, R. Hall-Wilton, M. E. Hayes, G. P. Heath, H. F. Heath, J. D. McFall, D. Piccioni, D. G. Roff, R. J. Tapper, M. Arneodo, R. Ayad, M. Capua, A. Garfagnini, L. 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    Research output: Contribution to journalArticlepeer-review

    34 Citations (Scopus)

    Abstract

    A global event shape analysis of the multihadronic final states observed in neutral current deep inelastic scattering events with a large rapidity gap with respect to the proton direction is presented. The analysis is performed in the range 5 ≤ Q2 ≤ 185 GeV2 and 160 ≤ W ≤ 250 GeV, where Q2 is the virtuality of the photon and W is the virtual-photon proton centre of mass energy. Particular emphasis is placed on the dependence of the shape variables, measured in the γ * -pomeron rest frame, on the mass of the hadronic final state, MX. With increasing MX the multihadronic final state becomes more collimated and planar. The experimental results are compared with several models which attempt to describe diffractive events. The broadening effects exhibited by the data require in these models a significant gluon component of the pomeron.

    Original languageEnglish
    Pages (from-to)368-384
    Number of pages17
    JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
    Volume421
    Issue number1-4
    DOIs
    Publication statusPublished - 1998 Mar 5

    Bibliographical note

    Funding Information:
    Financial support for this work was provided by the Department of Civil and Environmental Engineering at Bucknell University. The authors thank Central Builders Supply (Lewisburg, PA) and Wyo-Ben Inc. (Billings, MT) for donating materials used in this study. Also, the authors appreciate the effort of the following Bucknell University Civil Engineering undergraduates who worked on this project: Scott Conners, Justin Keister, Matthew Crandall, and Immanuel Palugod.

    Funding Information:
    Financial support for this work was provided by the Department of Civil and Environmental Engineering at Bucknell University. The authors thank Central Builders Supply (Lewisburg, PA) and Wyo- Ben Inc. (Billings, MT) for donating materials used in this study. Also, the authors appreciate the effort of the following Bucknell University Civil Engineering undergraduates who worked on this project: Scott Conners, Justin Keister, Matthew Crandall, and Immanuel Palugod.

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

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