FAIR NExt generation of ScientistS 2013 | |
How spinodal decomposition influences observables at FAIR energies | |
Herold, Christoph^1,2,3 ; Nahrgang, Marlene^3,4 ; Mishustin, Igor^3,5 ; Bleicher, Marcus^2,3 | |
School of Physics, Suranaree University of Technology, 111 University Avenue, Nakhon Ratchasima 30000, Thailand^1 | |
Institut für Theoretische Physik, Goethe-Universität, Max-von-Laue-Str. 1, 60438 Frankfurt am Main, Germany^2 | |
Frankfurt Institute for Advanced Studies (FIAS), Ruth-Moufang-Str. 1, 60438 Frankfurt am Main, Germany^3 | |
Department of Physics and CTMS, Duke University, Durham, NC 27708, United States^4 | |
Kurchatov Institute, National Research Center, 123182 Moscow, Russia^5 | |
关键词: Coordinate space; Correlation lengths; Coupled systems; First-order phase transitions; Heavy ion collision; Non-equilibrium dynamics; Spatial fluctuation; Spinodal instability; | |
Others : https://iopscience.iop.org/article/10.1088/1742-6596/503/1/012004/pdf DOI : 10.1088/1742-6596/503/1/012004 |
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来源: IOP | |
【 摘 要 】
The FAIR facility will make the region of high net-baryon densities experimentally accessible, where a first-order phase transition is conjectured. We investigate the dynamics of chiral symmetry breaking and the onset of confinement during a heavy-ion collision at large baryochemical potentials within a nonequilibrium chiral fluid dynamics model including effects of dissipation and noise. The order parameters are explicitly propagated and coupled to a fluid dynamically expanding medium of quarks. We demonstrate that the coupled system is strongly influenced by the nonequilibrium dynamics, leading only to a weak growth of the correlation length near the critical point. At the first-order phase transition, spinodal instabilities create domains in the order parameters and large spatial fluctuations in the baryon density within single events. As a consequence we find a clear enhancement of higher flow harmonics in coordinate space at the first-order phase transition in comparison with transitions through the crossover or critical point.
【 预 览 】
Files | Size | Format | View |
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How spinodal decomposition influences observables at FAIR energies | 491KB | download |