Violation of energy-per-hadron scaling in a resonance matter

Abstract

Yields of hadrons, their average masses and energies per hadron at the stage of chemical freeze-out in (ultra)relativistic heavy-ion collisions are analyzed within the statistical model. The violation of the scaling <E>/<N> = 1 GeV observed in Au+Au collisions at $\sqrt{s}$ = 130 AGeV is linked to the formation of resonance-rich matter with a considerable fraction of baryons and antibaryons. The rise of the energy-per-hadron ratio in baryon-dominated matter is discussed. A violation of the scaling condition is predicted for a very central zone of heavy-ion collisions at energies around 40 AGeV.

5 pages incl. 3 figures and 2 tables, to be published in Phys. Rev. C

References in corpus (5)

• Hadron production in Au-Au collisions at RHIC
• Lambda production in central Pb+Pb collisions at CERN-SPS energies
• Chemical freeze-out parameters at RHIC from microscopic model calculations
• Energy dependence of kaon production in central Pb+Pb collisions
• Strangeness production in heavy ion collisions at SPS and RHIC within two-source statistical model

Cited by in corpus (7)

• Comparison of Chemical Freeze-Out Criteria in Heavy-Ion Collisions
• Equilibrium Statistical-Thermal Models in High-Energy Physics
• Strange fireball as an explanation of the muon excess in Auger data
• $D$-mesons and charmonium states in hot pion matter
• Probing chemical freeze-out criteria in relativistic nuclear collisions with coarse grained transport simulations
• Analysis of particle production in ultra-relativistic heavy ion collisions within a two-source statistical model
• Density resummation of perturbation series in a pion gas to leading order in chiral perturbation theory