Thermal hadron production in relativistic nuclear collisions

Abstract

We present the status of the description of hadron production in central nucleus-nucleus collisions within the statistical model . Extending previous studies by inclusion of very high-mass resonances (m>2 GeV), and the up-to-now neglected scalar $\sigma$ meson leads to an improved description of the data. In particular, the hitherto poorly reproduced energy dependence of the K+/pi+ ratio at SPS energies ("the horn") is now well described through the connection to the hadronic mass spectrum and, implicitly, Hagedorn's limiting temperature.

8 pages, 4 figures (v2: typo in Eq.1 corrected); to appear in the proceedings of the IV Workshop on Particle Correlations and Femtoscopy (WPCF2008), Krakow, 2008; datafiles with calculations available at http://www-linux.gsi.de/~andronic/physics/s/s.html

References in corpus (13)

• Systematic Measurements of Identified Particle Spectra in pp, d+Au and Au+Au Collisions from STAR
• Phases of Dense Quarks at Large N_c
• Thermal Equilibration and Expansion in Nucleus-Nucleus Collision at the AGS
• Thermal hadron production in relativistic nuclear collisions: the hadron mass spectrum, the horn, and the QCD phase transition
• Features of particle multiplicities and strangeness production in central heavy ion collisions between 1.7A and 158A GeV/c
• Maximum Relative Strangeness Content in Heavy Ion Collisions Around 30 A.GeV
• Energy dependence of phi meson production in central Pb+Pb collisions at sqrt(s_nn) = 6 to 17 GeV
• Energy dependence of Lambda and Xi production in central Pb+Pb collisions at 20A, 30A, 40A, 80A, and 158A GeV measured at the CERN Super Proton Synchrotron
• The Thermal Production of Strange and Non-Strange Hadrons in e+e- Collisions
• Chemical freeze-out in ultra-relativistic heavy ion collisions at sqrt(s)_NN = 130 and 200 GeV
• Thermal description of hadron production in e+e- collisions revisited
• Strangeness fluctuations and MEMO production at FAIR
• The Phase Diagram of Strongly-Interacting Matter

Cited by in corpus (10)

• Effective (kinetic freeze-out) temperature, transverse flow velocity and kinetic freeze-out volume in high energy collisions
• Excitation Functions of Tsallis-like Parameters in High-Energy Nucleus-Nucleus Collisions
• Study of Dependence of Kinetic Freezeout Temperature on the Production Cross Section of Particles in Various Centrality Intervals in Au Au and Pb Pb Collisions at High Energies
• Analyzing transverse momentum spectra by a new method in high-energy collisions
• Analysis of identified particle transverse momentum spectra produced in pp, p--Pb and Pb--Pb collisions at the LHC using Tsallis--Pareto-type function
• Rapidity and Energy Dependences of Temperatures and Volume Extracted from Identified Charged Hadron Spectra in Proton-Proton Collisions at a Super Proton Synchrotron (SPS)
• Thermodynamic Signatures and Phase Transitions in High-Energy Au-Au Collisions
• Modeling net-charge fluctuations in heavy-ion collisions at the LHC
• Energy dependent chemical potentials of light hadrons and quarks based on transverse momentum spectra and yield ratios of negative to positive particles
• Extracting Kinetic Freeze-out Properties in High Energy Collisions Using a Multi-source Thermal Model