title: Relativistic shock waves in viscous gluon matter.
abstract: We solve the relativistic Riemann problem in viscous gluon matter employing a microscopic parton cascade. We demonstrate the transition from ideal to viscous shock waves by varying the shear viscosity to entropy density ratio eta/s from zero to infinity. We show that an eta/s ratio larger than 0.2 prevents the development of well-defined shock waves on time scales typical for ultrarelativistic heavy-ion collisions. Comparisons with viscous hydrodynamic calculations confirm our findings.
authors: Institut für Theoretische Physik, Johann Wolfgang Goethe-Universität, Max-von-Laue-Strasse 1, D-60438 Frankfurt am Main, Germany.
authors: I
authors: I
authors: Bouras
authors: E
authors: E
authors: Molnár
authors: H
authors: H
authors: Niemi
authors: Z
authors: Z
authors: Xu
authors: A
authors: A
authors: El
authors: O
authors: O
authors: Fochler
authors: C
authors: C
authors: Greiner
authors: D H
authors: DH
authors: Rischke