Dynamical freeze-out criterion in event-by-event hydrodynamics

Abstract

In hydrodynamical modelling of ultrarelativistic heavy-ion collisions the freeze-out is typically assumed to take place on a surface of constant temperature or energy density. In this work we apply a dynamical freeze-out criterion, which compares the hydrodynamical expansion rate with the pion scattering rate, to an event-by-event ideal hydrodynamics at the full RHIC collision energy. We present hadron spectra and elliptic flow calculated using (2+1)-dimensional ideal hydrodynamics, and show the differences between constant temperature and dynamical freeze-out criteria. We find that when the freeze-out ratio is fixed to one, the different freeze-out criteria lead to slightly different spectra and v_2(p_T) in the event-by-event calculations.

Proceedings of Strangeness in Quark Matter 2013 conference, 21-27 July 2013, 4 pages, 5 figures

References in corpus (4)

• Event-by-event hydrodynamics and elliptic flow from fluctuating initial state
• Chemical freeze-out temperature in hydrodynamical description of Au+Au collisions at sqrt(s_NN) = 200 GeV
• Dynamical freeze-out condition in ultrarelativistic heavy ion collisions
• Dynamical freeze-out in event-by-event hydrodynamics

Cited by in corpus (3)

• Hydrodynamic Approaches in Relativistic Heavy Ion Reactions
• Influence of temperature dependent shear viscosity on elliptic flow at back- and forward rapidities in ultrarelativistic heavy-ion collisions
• Dynamical freeze-out criterion in a hydrodynamical description of Au + Au collisions at $\sqrt{s_{\mathrm{NN}}}=200$ GeV and Pb + Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2760$ GeV