Abstract
Data on the multiplicity of pions produced in nucleon-nucleon interactions and central collisions of identical nuclei are discussed using a statistical approach. It is argued that the suppression of the pion production observed at low energies (p LAB <15 GeV/c per nucleon) is due to entropy transfer to baryons. The enhancement of the entropy production in central S+S collisions at 200 GeV/c per nucleon may be interpreted as manifestation of the increase, by a factor of about 3, of the effective number of degrees of freedom in the early stage of the collision.
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Gaździcki, M. Entropy in nuclear collisions. Z. Phys. C - Particles and Fields 66, 659–662 (1995). https://doi.org/10.1007/BF01579641
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DOI: https://doi.org/10.1007/BF01579641