Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-07-26
Phys.Rev.C81:041901,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
Version published in Phys.Rev.C. 5 pages, 1 figure
Scientific paper
10.1103/PhysRevC.81.041901
Following the procedure introduced by Israel and Stewart, we expand the entropy current up to the third order in the shear stress tensor $\pi^{\alpha\beta}$ and derive a novel third-order evolution equation for $\pi^{\alpha\beta}$. This equation is solved for the one-dimensional Bjorken boost-invariant expansion. The scaling solutions for various values of the shear viscosity to the entropy density ratio $\eta/s$ are shown to be in very good agreement with those obtained from kinetic transport calculations. For the pressure isotropy starting with 1 at $\tau_0=0.4 fm/c$, the third-order corrections to Israel-Stewart theory are approximately 10\% for $\eta/s=0.2$ and more than a factor of 2 for $\eta/s=3$. We also estimate all higher-order corrections to Israel-Stewart theory and demonstrate their importance in describing highly viscous matters.
El Andrej
Greiner Carsten
Xu Zhiyong
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