Speaker
Denes Molnar
(Purdue University)
Description
Comparison of hydrodynamics calculations to heavy-ion experiments inevitably requires conversion of the fluid to particles ("particlization"). For fluids that are not in perfect local equilibrium, for example because they have nonzero viscosity, one needs a model that describes nonthermal "delta-f" corrections to the phase space density of particle species. In the case of shear viscous fluids, the problem has been customarily ignored and simple additive corrections quadratic in momentum have been applied (so called Grad ansatz). More recently, however, a variety of theoretically better motivated shear corrections have been proposed based on insights from kinetic theory in various approximations (such as linearized kinetic theory, the relaxation time approximation, or near the free streaming limit). The choice of corrections affects observables such as identified particle elliptic flow v2(pT). We present results from accurate numerical simulations of fully nonlinear Boltzmann transport theory, and test the applicability of different shear "delta-f" models.
Primary author
Denes Molnar
(Purdue University)
Co-author
Mridula Damodaran
(Purdue University)
