Kinetic freeze-out in central heavy-ion collisions between 7.7 and 2760 GeV per nucleon pair
Abstract
We fit the single-particle pt 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. The 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 s NN above 27 GeV is small.
- Publication:
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Journal of Physics G Nuclear Physics
- Pub Date:
- April 2020
- DOI:
- 10.1088/1361-6471/ab5f03
- arXiv:
- arXiv:1908.03023
- Bibcode:
- 2020JPhG...47d5107M
- Keywords:
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- heavy-ion collisions;
- kinetic freeze-out;
- blast-wave model;
- Nuclear Theory;
- High Energy Physics - Phenomenology;
- Nuclear Experiment
- E-Print:
- 21 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