3,151 research outputs found
Particle Ratios at CERN, BNL and GSI : Unified Description of Freeze-Out Parameters
It is shown that the chemical freeze-out parameters obtained at CERN/SPS,
BNL/AGS and GSI/SIS energies all correspond to a unique value of 1 GeV for the
average energy per hadron.Comment: 4 pages, 3 Postscript figures, uses espcrc1.sty
THERMUS -- A Thermal Model Package for ROOT
THERMUS is a package of C++ classes and functions allowing
statistical-thermal model analyses of particle production in relativistic
heavy-ion collisions to be performed within the ROOT framework of analysis.
Calculations are possible within three statistical ensembles; a grand-canonical
treatment of the conserved charges B, S and Q, a fully canonical treatment of
the conserved charges, and a mixed-canonical ensemble combining a canonical
treatment of strangeness with a grand-canonical treatment of baryon number and
electric charge. THERMUS allows for the assignment of decay chains and detector
efficiencies specific to each particle yield, which enables sensible fitting of
model parameters to experimental data.Comment: to be published in Computer Physics Communication
Van der Waals Excluded Volume Model of Multicomponent Hadron Gas
A generalization of the Van der Waals excluded volume procedure for the
multicomponent hadron gas is proposed. The derivation is based on the grand
canonical partition function for the system of particles of several species
interacting by hard core potentials. The obtained formulae for thermodynamical
quantities are consistent with underlying principles of statistical mechanics
as well as with thermodynamical identities. The model can be applied to the
analysis of experimental data for particle number ratios in relativistic
nucleus-nucleus collisions.Comment: 8 page
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