Quasiparticle anisotropic hydrodynamics

Workshop for young scientists on the physics of ultrarelativistic nucleus-nucleus collisions 2016

Alqahtani, Mubarak^1 ; Strickland, Michael^1

Kent State University, Kent

OH

44242, United States^1

关键词: Bulk viscosity;    Entropy density;    Particle spectra;    Quark-gluon plasma;    Quasi particles;    Transverse momenta;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/832/1/012051/pdf
DOI  :  10.1088/1742-6596/832/1/012051

来源: IOP

【 摘 要 】

We study an azimuthally-symmetric boost-invariant quark-gluon plasma using quasiparticle anisotropic hydrodynamics including the effects of both shear and bulk viscosities. We compare results obtained using the quasiparticle method with the standard anisotropic hydrodynamics and viscous hydrodynamics. We consider the predictions of the three methods for the differential particle spectra and mean transverse momentum. We find that the three methods agree for small shear viscosity to entropy density ratio, η/s, but show differences at large η/s. Additionally, we find that the standard anisotropic hydrodynamics method shows suppressed production at low transverse-momentum compared to the other two methods, and the bulk-viscous correction can drive the primordial particle spectra negative at large pTin viscous hydrodynamics.