Elsevier

Nuclear Physics B

Volume 76, Issue 1, 4 July 1974, Pages 29-47
Nuclear Physics B

Rapidity-gap separation and study of single-diffraction dissociation in pp collisions at 12 and 24 GeV/c

https://doi.org/10.1016/0550-3213(74)90135-7Get rights and content

Abstract

An event-by-event separation of the single-diffractive component in the inclusive reaction p + p → p + X is attempted with our 12 and 24 GeV/c bubble-chamber data, using a method involving largest rapidity gaps. The method yields a (non-strange) single-diffraction cross section of about 7 mb at both energes, dominated by two and four prongs. For the diffractive component the recoil mass distribution dσ/dMX2 shows a sharp peak near MX2 = 2 GeV2 at both energies, with a long tail that broadens significantly with increasing energy. This shape is reasonably well described by the diffractive terms of a triple-Regge fit to the full pp data. The slope parameter of the diffractive t distribution shows a precipitous drop with increasing MX2, levelling off abruptly at MX2 ≈ 3 GeV2. The mean charged multiplicity of the diffractive system appears to be linear in log MX2 and independent of s.

References (38)

  • K. Fialkowski

    Phys. Letters

    (1972)
  • K. Fialkowski et al.

    Phys. Letters

    (1973)
  • L. Van Hove

    Phys. Letters

    (1973)
  • R.G. Roberts et al.

    Phys. Letters

    (1973)
  • H. Harari et al.

    Phys. Letters

    (1973)
  • F.T. Dao

    Phys. Letters

    (1973)
    F.T. Dao

    Phys. Letters

    (1973)
  • S.J. Barish

    Phys. Rev. Letters

    (1973)
  • H.J. MückH.J. Mück
  • U. Idschok

    Nucl. Phys.

    (1973)
  • V. Blobel et al., Nucl. Phys. B, to be...
  • H. Fesefeldt

    thesis

    (1973)
  • G.F. Chew

    Phys. Rev.

    (1973)
    G.F. Chew

    Phys. Rev.

    (1973)
  • L. Van Hove
  • R.M. Edelstein

    Phys. Rev.

    (1972)
  • H. Satz

    Proc. of Amsterdam Int. Conf. on elementary particles

  • N. Sakai et al.

    Nuovo Cimento Letters

    (1973)
  • P. Pirilä et al.

    Nuovo Cimento

    (1973)
  • C. Quigg et al.

    THY.-93

    (1972)
  • W.R. Frazer et al.

    Phys. Rev.

    (1973)
  • Cited by (33)

    • A la recherche d'un nouveau boson de spin un

      1981, Nuclear Physics, Section B
    View all citing articles on Scopus

    This work has been partially supported by the Bundesministerium für Forschung und Technologie.

    Max-Planck-Institut für Physik und Astrophysik, München.

    ∗∗

    We are much indebted to the crews of the CERN PS and of the CERN 2m HBC and to the builders of the U5 beam. We wish to thank J. Fent, H.H. Nagel and J. Seyerlein, who have been responsible for the development of our flying-spot-digitizers. Finally we would like to thank K. Böckmann, A. Eskreys, J. Lamsa and P. Söding for useful discussions and criticisms.

    ǂ

    Deutsches Elektronen-Synchrotron DESY, Hamburg and II. Institut für Experimentalphysik der Universität Hamburg.

    +

    Physikalisches Institut der Universität Bonn.

    X

    Also at CERN, Geneva.

    View full text