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Comparison ofJ/ψ-suppression in photon, hadron and nucleus-nucleus collisions: Where is the quark-gluon plasma?

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Zeitschrift für Physik C Particles and Fields

Abstract

The data ofJ/ψ-production cross sections from photon, hadron and nucleus-nucleus collisions are plotted against the length of thec \(\bar c\) final state trajectory in nuclear matter. A value for the absorption cross section per nucleon of σ ψNabs =(6.2±0.3) mb is deduced from the baryon and photon induced reactions and σ ψNabs =(6.9±1.0) mb from the nucleus-nucles collisions. The equality of cross sections implies that additional suppression effects from a quark-gluon plasma are not visible.

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Authors and Affiliations

  1. Institut de Physique Nucléaire, F-91406, Orsay Cedex, France

    C. Gerschel

  2. Institut für Theoretische Physik, Universität, W-6900, Heidelberg, Germany

    J. Hüfner

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  1. C. Gerschel
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  2. J. Hüfner
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Gerschel, C., Hüfner, J. Comparison ofJ/ψ-suppression in photon, hadron and nucleus-nucleus collisions: Where is the quark-gluon plasma?. Z. Phys. C - Particles and Fields 56, 171–174 (1992). https://doi.org/10.1007/BF01589720

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  • DOI: https://doi.org/10.1007/BF01589720

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