Divergence-type 2+1 dissipative hydrodynamics applied to heavy-ion collisions

JERÓNIMO PERALTA RAMOS; ESTEBAN CALZETTA

PHYS. REV. - C

AMER PHYSICAL SOC

Lugar: Ridge; Año: 2010 vol. 82 p. 1 - 11

0556-2813

We apply divergence-type theory (DTT) dissipative hydrodynamics to study the 2 + 1 space-time evolution of the fireball created in Au+Au relativistic heavy-ion collisions at√sNN = 200 GeV.DTTs are exact hydrodynamic theories that do not rely on velocity gradient expansions and therefore go beyond second-order theories. We numerically solve the equations of motion of the DTT for Glauber initial conditions and compare the results with those of second-order theory based on conformal invariance (Baier-Romatschke-Son-Starinets model) and with data. We find that the charged-hadron minimum-bias elliptic flow reaches its maximum value at lower pT in the DTT, and that the DTT allows for a value of η/s slightly larger than that of the BRSS. Our results show that the differences between viscous hydrodynamic formalisms are a significant source of uncertainty in the precise extraction of η/s from experiments.