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Diffraction dissociation of nuclei in 450 GeV/c proton-nucleus collisions

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Zeitschrift für Physik C Particles and Fields

Abstract

Diffractive dissociation of nuclei (Be, Al, W) in collisions with 450 GeV/c protons,pA→pX, has been measured with the HELIOS spectrometer at the CERN Super Proton synchrotron. The dependence of the single-diffraction cross-section on the nuclear massA can be parametrized as σSD mb×A 0.35±0.02, showing the peripheral nature of the process. The differential cross-section dσSD=(3.8±0.3)mb ×A 0.35±0.02, is exponential with the slope parameter, increasing from 6.2±0.4 (GeV/c)−2 for beryllium to 7.9±0.5 (GeV/c)−2 for tungsten. The slope parameter also increases with increasing massM X of the diffractively produced state. The rapidity, multiplicity, and transverse-momentum distributions of the particles of the diffractively produced stateX show a longitudinal phase-space population and are remarkably insensitive to the nuclear mass. This, together with theA 1/3 dependence of σSD, suggests that the dominant process of nuclear diffractive excitation is the dissociation of single nucleons.

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Author information

Author notes

  1. D. Bettoni

    Present address: University of Syracuse, 13244-1130, Syracuse, NY, USA

  2. H. Bøggild

    Present address: Niels Bohr Institute, DK-2100, Copenhagen, Denmark

  3. K. Dederichs & M. A. Faessler

    Present address: Ludwig-Maximilians-Universität, W-8000, Munich 40, FRG

  4. R. C. E. Devenish

    Present address: Oxford University, OX1 3NP, Oxford, UK

  5. M. Sekimoto

    Present address: Institute of Nuclear Study, 188, Tokyo, Japan

  6. M. Seman

    Present address: Slovak Academy of Sciences, CS-04353, Kosice, Czechoslovakia

  7. R. Veenhof

    Present address: NIKHEF-H, NL-1009 DB, Amsterdam, The Netherlands

Authors and Affiliations

  1. University of Bari and INFN, I-70100, Bari, Italy

    M. T. Muciaccia & S. Simone

  2. Brookhaven National Laboratory, 11973, NY, Upton, USA

    H. Kraner, L. Olsen, V. Polychronakos, D. Rahm & I. Stumer

  3. CERN, CH-1211, Geneva 23, Swltzerland

    T. Åkesson, H. Atherton, H. Beker, D. Bettoni, H. Bøggild, K. Dederichs, R. C. E. Devenish, H. En'yo, C. W. Fabjan, M. A. Faessler, U. Goerlach, V. Hedberg, M. A. Mazzoni, F. Piuz, G. Poulard, M. Price, L. Sandor, J. Schukraft, M. Sekimoto, M. Seman, H. Sletten, H. H. Thodberg, R. Veenhof, R. Wigmans & W. J. Willis

  4. University of Heidelberg, W-6900, Heidelberg, Fed. Rep. Germany

    H. W. Bartels, A. Drees, P. Fischer, P. Glässel, A. Hölscher, V. Kroh, M. Neubert, A. Pfeiffer & H. J. Specht

  5. Los Alamos National Laboratory, 87 544, Los Alamos, NM, USA

    N. DiGiacomo, H. van Hecke, B. Jacak, P. McGaughey, W. Sondheim & J. W. Sunier

  6. University of Lund, S-223 62, Lund, Sweden

    S. Almehed, R. Haglund, G. Jarlskog, S. Johanson, B. Lorstad & U. Mjornmark

  7. McGill University, H3A 2T8, MOntreal, Quebec, Canada

    F. Corriveau, L. A. Hamel, F. Lamarche, C. Leroy, E. Mazzucato, Y. Sirois & P. Yepes

  8. University of Montreal, HC3 3J7, Montreal, Quebec, Canada

    P. Aubry, G. Beaudoin, J. M. Beaulieu, P. Depommier & A. Lounis

  9. Lebedev Institute of Physics, SU-117924, Moscow, USSR

    S. Muraviev, A. Shmeleva & V. Tikhomirov

  10. Institute of Physics and Engineering, SU-115409, Moscow, USSR

    B. Dolgoshein, S. Smirnov & V. Tcherniatin

  11. Institute of Nuclear Physics, SU-630 090, Novosibirsk, USSR

    V. Sidorov

  12. University of Pittsburgh, 15260, Pittsburgh, PA, USA

    W. Cleland, M. Clemen, B. Collick, D. Lisauer, M. Murray, Y. M. Park & J. Thompson

  13. University of Rome ‘La Sapienza’ and INFN, I-00185, Rome, Italy

    S. Dell'Uomo, S. DiLiberto, F. Meddi & G. Rosa

  14. Rutherford Appleton Laboratory, OX1 OQX, Didcot, UK

    N. A. McCubbin

  15. DPhPE, CEN-Saclay, F-91191, Gif-sur-Yvette, France

    A. Gaidot, F. Gibrat-Debu, G. London, J. P. Pansart & G. Vasseur

  16. University of Salerno and INFN, I-84100, Salerno, Italy

    G. Romano

  17. University of Stokholm, S-113 46, Stockholm, Sweden

    B. Erlandsson & S. Nilsson

  18. University of Tel Aviv, 9978, Ramat Aviv, Israel

    O. Benary, S. Dagan, R. Heifetz, D. Lisauer & Y. Oren

  19. University of Turin and INFN, I-10100, Turin, Italy

    V. Bisi, P. Giubellino, F. Martelli (‘Angelo Della Riccia’ fellow), A. marzari-Chiesa, M. Masera, L. Ramello & L. Riccati

  20. University College London, WC1E 6BT, London, UK

    A. L. S. Angelis, J. R. Dodd & M. J. Esten

  21. Weizmann Institute, 76 100, Renovot, Israel

    I. Blevis, Z. Fraenkel & I. Tserruya

Authors
  1. T. Åkesson
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  2. S. Almehed
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HELIOS Collaboration., Åkesson, T., Almehed, S. et al. Diffraction dissociation of nuclei in 450 GeV/c proton-nucleus collisions. Z. Phys. C - Particles and Fields 49, 355–366 (1991). https://doi.org/10.1007/BF01549687

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  • DOI: https://doi.org/10.1007/BF01549687

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