Quasiparticle anisotropic hydrodynamics for central collisions

被引:35
作者
Alqahtani, Mubarak [1 ]
Nopoush, Mohammad [1 ]
Strickland, Michael [1 ]
机构
[1] Kent State Univ, Dept Phys, Kent, OH 44242 USA
关键词
QUARK-GLUON PLASMA; GAUGE-THEORIES; ELLIPTIC FLOW; DYNAMICS; FLUCTUATIONS; TEMPERATURE; RESUMMATION; VISCOSITY; SYSTEMS; FLUIDS;
D O I
10.1103/PhysRevC.95.034906
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
We use quasiparticle anisotropic hydrodynamics to study an azimuthally symmetric boost-invariant quark-gluon plasma including the effects of both shear and bulk viscosities. In quasiparticle anisotropic hydrodynamics, a single finite-temperature quasiparticle mass is introduced and fit to the lattice data in order to implement a realistic equation of state (EoS). We compare results obtained by using the quasiparticle method with the standard method of imposing the EoS in anisotropic hydrodynamics and viscous hydrodynamics. Using these three methods, we extract the primordial particle spectra, total number of charged particles, and average transverse momentum for various values of the shear viscosity to entropy density ratio eta/s. We find that the three methods agree well for small shear viscosity to entropy density ratio eta/s, but differ at large eta/s, with the standard anisotropic EoS method showing suppressed production at low transverse-momentum compared with the other two methods considered. Finally, we demonstrate explicitly that, when using standard viscous hydrodynamics, the bulk-viscous correction can drive the primordial particle spectra negative at large p(T). Such behavior is not seen in either anisotropic hydrodynamics approach, irrespective of the value of eta/s.
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页数:13
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