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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