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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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