title: New exact solution of the relativistic Boltzmann equation and its hydrodynamic limit.
abstract: We present an exact solution of the relativistic Boltzmann equation for a system undergoing boost-invariant longitudinal and azimuthally symmetric transverse flow ("Gubser flow"). The resulting exact nonequilibrium dynamics is compared to first and second order relativistic hydrodynamic approximations for various shear viscosity to entropy density ratios. This novel solution can be used to test the validity and accuracy of different hydrodynamic approximations in conditions similar to those generated in relativistic heavy-ion collisions.
authors.affiliation: Department of Physics, McGill University, 3600 University Street, Montreal, Quebec H3 A 2T8, Canada.
authors.forename: Gabriel S
authors.initials: GS
authors.lastname: Denicol
authors.affiliation: Department of Physics, The Ohio State University, Columbus, Ohio 43210-1117, USA.
authors.forename: Ulrich
authors.initials: U
authors.lastname: Heinz
authors.affiliation: Department of Physics, The Ohio State University, Columbus, Ohio 43210-1117, USA.
authors.forename: Mauricio
authors.initials: M
authors.lastname: Martinez
authors.affiliation: Instituto de Física, Universidade de São Paulo, C.P. 66318, 05315-970 São Paulo, SP, Brazil.
authors.forename: Jorge
authors.initials: J
authors.lastname: Noronha
authors.affiliation: Department of Physics, Kent State University, Kent, Ohio 44242, USA.
authors.forename: Michael
authors.initials: M
authors.lastname: Strickland