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The European Physical Journal C
ISSN: 1434-6044 (printed version)
ISSN: 1434-6052 (electronic version)
Abstract Volume 5 Issue 2 (1998) pp 357-361
DOI 10.1007/s100529800853
theoretical physics:
Comment on entropy production in nuclear collisions
P. Brady, J. Dunn
University of California, Davis, CA 95616, USA
Received: 11 November 1997 / Published online: 10 March 1998
Abstract. A recent analysis of the data for particle production in central nucleus-nucleus (AA) collisions finds an "enhancement" in particle multiplicities or entropy at the highest energies near 200A GeV (as compared to those at lower energies). This is interpreted within a relativistic photon gas model as an increase in the number of degrees of freedom, and the formation of the quark-gluon plasma between AGS and SPS energies is hypothesized. We find that particle multiplicities in $p$A collisions also show an enhancement at large F, a nonlinear increase with the Fermi energy variable, $F$. This suggests the possibility that the enhancement seen in AA collisions is also due to such a non-linearity in F.
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Online publication: August 25, 1998
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