https://doi.org/10.1140/epja/i2008-10634-2
Letter
Transverse-mass effective temperature in heavy-ion collisions from AGS to SPS
1
Gesellschaft für Schwerionenforschung mbH, Planckstr. 1, D-64291, Darmstadt, Germany
2
Kurchatov Institute, Kurchatov sq. 1, Moscow, 123182, Russia
* e-mail: Y.Ivanov@gsi.de
Received:
14
April
2008
Revised:
16
June
2008
Published online:
6
August
2008
Transverse-mass spectra in Au + Au and Pb + Pb collisions in the incident energy range from 2A to 160A GeV are analyzed within the model of 3-fluid dynamics (3FD). It is shown that the dynamical description of freeze-out, accepted in this model, naturally explains the incident-energy behavior of the inverse-slope parameters of these spectra observed in experiment. The simultaneous reproduction of the inverse slopes of all considered particles (ρ, π and K) suggests that these particles belong to the same hydrodynamic flow at the instant of their freeze-out.
PACS: 24.10.Nz Hydrodynamic models – / 25.75.-q Relativistic heavy-ion collisions –
© SIF, Springer-Verlag Berlin Heidelberg, 2008
