Elsevier

Nuclear Physics A

Volume 566, 3 January 1994, Pages 77-85
Nuclear Physics A

Jψ, ψ′ and muon pair production in p-W and S-U collisions

https://doi.org/10.1016/0375-9474(94)90611-4Get rights and content

Abstract

In this paper we present a study on the production of the Jψ and ψ′ resonances, decaying into muon pairs, in S-U collisions, at 200 GeV per incident nucleon. We find that the ratio between ψ′ and tJψ yields decreases as ET, the neutral transverse energy produced in the collision, increases. There is also a clear decrease of this ratio when going from p-W to S-U interactions. Assuming the high mass continuum to be Drell-Yan we discuss the possible understanding of the intermediate dimuon mass region as a superposition of Drell-Yan (extrapolated down in mass) and muon pairs from the semileptonic decays of charmed mesons. The p-W data is found to be explained by this procedure. However, the S-U data seems to be incompatible with a linear extrapolation from the proton-nucleus results.

References (15)

  • C. Baglin

    Phys. Lett.

    (1989)
  • H.-U. Bengtsson et al.

    Computer Physics Commun.

    (1987)
  • M. Glück et al.

    Z. Phys.

    (1992)
  • J. Badier

    Phys. Lett.

    (1980)
    E.L. Berger

    preprint ANL-HEP-CP-82-68

  • C. Baglin

    Phys. Lett.

    (1991)
  • Notice that a similar excess is observed, in S-W collisions, by the HELIOS/3 experiment. See the talk of M.A. Mazzoni...
  • H. Satz, these...S. Gupta et al.

    Phys. Lett.

    (1992)
There are more references available in the full text version of this article.

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