Kinetic freeze-out in central heavy-ion collisions between 7.7 and 2760 GeV per nucleon pair

Abstract

We fit the single-particle $p_t$ spectra of identified pions, kaons, and (anti)protons from central collisions of gold or lead nuclei at energies between 7.7 and 2760~GeV per nucleon pair. Blast wave model with included resonance production and with an assumption of partial chemical equilibrium is used and the fits are performed with the help of a Gaussian emulator process. A kinetic freeze-out temperature is found about 100~MeV for the lowest collision energies and 80~MeV at the LHC. The average transverse expansion velocity grows with increasing $\sqrt{s_{NN}}$ from 0.45 to 0.65. Due to partial chemical equilibrium, the influence of resonance decays on the shape of the $p_t$ spectra for $\sqrt{s_{NN}}$ above 27~GeV is small.

arXiv comment21 pages, 12 figures, updated version with improved explanations in the text, results not changed, some figures from the previous version were split, therefore the new version includes more figures

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Cited by in corpus (12)

• Kinetic freeze-out temperature from yields of short-lived resonances
• Global fluid fits to identified particle transverse momentum spectra from heavy-ion collisions at the Large Hadron Collider
• Blast-wave description of ${\rm Y}$ elliptic flow at energies available at the CERN Large Hadron Collider
• Fluid velocity from transverse momentum spectra
• A three component model for hadron $p_{\mathrm{T}}$-spectra in pp and Pb-Pb collisions at the LHC
• Supercooled Goldstone Bosons at the QCD Chiral Phase Transition
• Elliptic flow of deuterons in ultrarelativistic heavy-ion collisions
• Hierarchy of kinetic freeze-out parameters in low energy heavy-ion collisions
• Quenching through the QCD chiral phase transition
• Resonance production in partial chemical equilibrium
• Proton number fluctuations in partial chemical equilibrium
• Spectra and elliptic flow of light hadrons in an expanding fire-cylinder model for the RHIC Beam Energy Scan