Curvature of the freeze-out line in heavy ion collisions
| Autor: | Edwin Laermann, Peter Petreczky, Mathias Wagner, Christian Schmidt, Seema Sharma, W. Soeldner, Swagata Mukherjee, Hiroshi Ohno, P. Hegde, Frithjof Karsch, Olaf Kaczmarek, Alexei Bazavov, Heng-Tong Ding |
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| Rok vydání: | 2016 |
| Předmět: |
Particle physics
Nuclear Theory High Energy Physics::Lattice Lattice field theory FOS: Physical sciences Curvature 01 natural sciences Nuclear Theory (nucl-th) symbols.namesake High Energy Physics - Lattice High Energy Physics - Phenomenology (hep-ph) Lattice (order) 0103 physical sciences Taylor series Nuclear Experiment 010306 general physics Physics Quantum chromodynamics 010308 nuclear & particles physics High Energy Physics - Lattice (hep-lat) High Energy Physics::Phenomenology Lattice QCD Baryon High Energy Physics - Phenomenology Quantum electrodynamics symbols High Energy Physics::Experiment Heavy ion |
| Zdroj: | Physical Review D. 93 |
| ISSN: | 2470-0029 2470-0010 |
| DOI: | 10.1103/physrevd.93.014512 |
| Popis: | We calculate the mean and variance of net-baryon number and net-electric charge distributions from Quantum Chromodynamics (QCD) using a next-to-leading order Taylor expansion in terms of temperature and chemical potentials. We compare these expansions with experimental data from STAR and PHENIX, determine the freeze-out temperature in the limit of vanishing baryon chemical potential, and, for the first time, constrain the curvature of the freeze-out line through a direct comparison between experimental data on net-charge fluctuations and a QCD calculation. We obtain a bound on the curvature coefficient, kappa_2^f < 0.011, that is compatible with lattice QCD results on the curvature of the QCD transition line. 5 pages, 2 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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