Freeze-out conditions and pion spectrum in heavy-ion collisions
- 1 March 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review C
- Vol. 51 (3) , 1465-1472
- https://doi.org/10.1103/physrevc.51.1465
Abstract
Pion multiplicity and energy spectrum in medium energy heavy-ion collisions are analyzed in a model with spherical expansion, resonance decay contribution, and chemical nonequilibrium effects. fitting the data for central La+La collision at =1.35 GeV/nucleon we find that the physically reasonable freeze-out conditions require a strong collective motion to describe the pion spectrum and a positive value of pion chemical potential to fit the total pion multiplicity. The data do not lend to conclusive evidence on the presence of Δ resonance at the freeze-out.
Keywords
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