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The European Physical Journal C
ISSN: 1434-6044 (printed version)
ISSN: 1434-6052 (electronic version)
Abstract Volume 5 Issue 1 (1998) pp 129-133
DOI 10.1007/s100529800830
theoretical physics:
Pion suppression in nuclear collisions
Marek Gazdzicki (1), Mark I. Gorenstein (2), Stanislaw Mrówczynski (3)(4)
(1) Institut für Kernphysik, Universität Frankfurt, August-Euler-Strasse 6, D-60486 Frankfurt, Germany (e-mail: marek@ikf.physik.uni-frankfurt.de)
(2) Bogolyubov Institute for Theoretical Physics, UK-252143 Kiev, Ukraine (e-mail: goren@ap3.gluk.apc.org)
(3) Soltan Institute for Nuclear Studies, ul. Hoza 69, PL-00-681 Warsaw, Poland (e-mail: mrow@fuw.edu.pl)
(4) Institute of Physics, Pedagogical University, ul. Lesna 16, PL-25-509 Kielce, Poland
Received: 21 July 1997 / Revised version: 12 November 1997 / Published online: 26 February 1998
Abstract. The pion multiplicity per participating nucleon in central nucleus-nucleus collisions at the energies 2-15 A$\cdot$GeV is significantly smaller than in nucleon-nucleon interactions at the same collision energy. This effect of pion suppression is argued to appear due to the evolution of the system produced at the early stage of heavy-ion collisions towards a local thermodynamic equilibrium and further isentropic expansion.
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Online publication: August 4, 1998
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