Journal
PHYSICS LETTERS B
Volume 503, Issue 1-2, Pages 104-112Publisher
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DOI: 10.1016/S0370-2693(01)00092-2
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The cross sections of Y absorption by pi and rho mesons are evaluated in a meson-exchange model. Including form factors with a cutoff parameter of 1 or 2 GeV, we find that due to the large threshold of these reactions the thermal average of their cross sections is only about 0.2 mb at a temperature of 150 MeV. Our results thus suggest that the absorption of directly produced Y by hadronic comovers in high energy heavy ion collisions is unimportant. (C) 2001 Elsevier Science B.V. All rights reserved.
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