Bazavov, A. and Ding, H. -T. and Hegde, P. and Kaczmarek, O. and Karsch, F. and Laermann, E. and Mukherjee, Swagato and Petreczky, P. and Schmidt, C. and Smith, D. and Soeldner, W. and Wagner, M. (2012) Freeze-Out Conditions in Heavy Ion Collisions from QCD Thermodynamics. PHYSICAL REVIEW LETTERS, 109 (19): 192302. ISSN 0031-9007,
Full text not available from this repository.Abstract
We present a determination of freeze-out conditions in heavy ion collisions based on ratios of cumulants of net electric charge fluctuations. These ratios can reliably be calculated in lattice QCD for a wide range of chemical potential values by using a next-to-leading order Taylor series expansion around the limit of vanishing baryon, electric charge and strangeness chemical potentials. From a computation of up to fourth order cumulants and charge correlations we first determine the strangeness and electric charge chemical potentials that characterize freeze-out conditions in a heavy ion collision and confirm that in the temperature range 150 MeV <= T <= 170 MeV the hadron resonance gas model provides good approximations for these parameters that agree with QCD calculations on the 5%-15% level. We then show that a comparison of lattice QCD results for ratios of up to third order cumulants of electric charge fluctuations with experimental results allows us to extract the freeze-out baryon chemical potential and the freeze-out temperature.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FLUCTUATIONS; TEMPERATURE; RESTORATION; DENSITY; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 04 May 2020 08:17 |
| Last Modified: | 04 May 2020 08:17 |
| URI: | https://pred.uni-regensburg.de/id/eprint/17810 |
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