Elsevier

Nuclear Physics A

Volume 440, Issue 4, 24 July 1985, Pages 697-743
Nuclear Physics A

Neutral-pion production in central collisions of relativistic 12C and 40Ar on 208Pb

https://doi.org/10.1016/0375-9474(85)90404-XGet rights and content

Abstract

The production of π0 mesons in central collisions of 12C and 40Ar on 208Pb has been examined at a number of energies from 1. to 2.1 GeV/N, as part of the first systematic study as a function of beam energy and charged-particle multiplicity of the rate of neutral-pion production in relativistic heavy-ion collisions. For comparison, corresponding π± data acquired with the same detector system have also been presented. The results indicate that, for a given target-projectile combination, both neutral- and charged-pion production increase smoothly by a factor of approximately 2.9 in this energy range. The measurement of charged-particle multiplicity is discussed in order to indicate how the characteristic distributions observed in this study were used to parameterize the experimental results. The average multiplicity of both pions and nucleons projected from these data is found to disagree with statistical models of particle production. The significance of the Nπ±/Ncharge and Nπ±/Nπ0 ratios observed as a function of beam energy and charged-particle multiplicity is discussed in the context of understanding the nature of the collision process.

References (35)

  • H. Messel et al.

    Electron-photon shower distribution function

    (1970)
  • M.P. BudianskyG. Roche

    Nucl. Phys.

    (1985)
  • J. Cosset

    Phys. Rev.

    (1977)
  • G. Cecil et al.

    Phys. Rev.

    (1979)
  • H. Noll

    Phys. Rev. Lett.

    (1984)
    P. Braun-Munzinger

    Phys. Rev. Lett.

    (1984)
  • A. Sandoval

    Phys. Rev. Lett.

    (1980)
    J.J. Lu

    Phys. Rev. Lett.

    (1981)
    J. Gosset

    Phys. Rev.

    (1977)
    S. Nagamiya

    Phys. Rev.

    (1981)
    A. Sandoval

    Phys. Rev.

    (1980)
    F. Zarbakhsh

    Phys. Rev. Lett.

    (1981)
    A. Shor

    Phys. Rev. Lett.

    (1982)
    J. Chiba

    Phys. Rev.

    (1979)
    E.O. Abdrahmanov

    Z. Phys.

    (1980)
    B. Jakobsson

    Nucl. Phys.

    (1978)
    J.P. Sullivan

    Phys. Rev.

    (1982)
    J.D. Stevenson et al.

    Phys. Rev. Lett.

    (1981)
    W.O. Meyer et al.

    Phys. Rev.

    (1980)
    S.Y. Fung

    Phys. Rev. Lett.

    (1978)
    S.Y. Fung

    Phys. Rev. Lett.

    (1978)
    R. Stock

    Phys. Rev. Lett.

    (1980)
    S. Nagamiya

    Phys. Lett.

    (1979)
    K. Nakai

    Phys. Rev.

    (1979)
  • W. Shimmerling

    Phys. Rev. Lett.

    (1979)
    R.A. Cecil

    Phys. Rev.

    (1981)
  • W. DeJarnette

    Phys. Lett.

    (1980)
    M.P. Budiansky et al.

    Phys. Rev. Lett.

    (1982)
    M.P. BudianskyG. Roche

    Nucl. Phys.

    (1985)
  • T. Hallman
  • A. Sandoval

    Phys. Rev.

    (1980)
    A. Sandoval et al., AIP report PAPS PRVCA...
  • W.H. Barkas et al.

    National Academy of Sciences — National Research Council publication, no. 1133

    (1964)
  • G.B. Hagemann

    Nucl. Phys.

    (1975)
  • P.N. Kirk, private...
  • R. Stock

    Phys. Rev. Lett.

    (1980)
    A. Sandoval

    Phys. Rev.

    (1980)
  • J.J. Lu

    Phys. Rev. Lett.

    (1981)
    K.L. Wolf

    Phys. Rev. Lett.

    (1979)
    J. Chiba

    Phys. Rev.

    (1979)
    S. Nagamiya

    Phys. Rev.

    (1981)
    S.Y. Fung

    Phys. Rev. Lett.

    (1978)
    K. Nakai

    Phys. Rev.

    (1979)
  • D.A. Ortendahl

    Lawrence Berkeley Laboratory report LBL-5305

    (1976)
  • E. Longo et al.

    Nucl. Instr. Meth.

    (1975)
  • Cited by (8)

    • Direct electron-pair production by 6.4 TeV <sup>32</sup>S emulsion interactions

      1996, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
    • External electron pair production in high-energy collisions

      1996, Nuovo Cimento della Societa Italiana di Fisica A
    View all citing articles on Scopus

    This work was supported by the US Department of Energy under contract DE-AC02-76ER03274.

    Present address: Columbia Scientific Incorporated, Columbia, Maryland 21045, USA.

    ∗∗

    Present address: Perkin-Elmer Corporation, Hayward, California, USA.

    View full text