4–9 Oct 2015
Europe/Berlin timezone

A viscous blast-wave model for high energy heavy-ion collisions

7 Oct 2015, 09:00
20m
Oral Presentation Collective Phenomena in High Energy Collisions Collective Phenomena in High Energy Collisions

Speaker

Dr Amaresh Jaiswal (GSI Helmholtzzentrum für Schwerionenforschung)

Description

Using a viscosity-based survival scale for geometrical perturbations formed in the early stages of relativistic heavy-ion collisions, we model the radial flow velocity during freeze-out. Subsequently, we employ the Cooper-Frye freeze-out prescription, with first-order viscous corrections to the distribution function, to obtain the transverse momentum distribution of particle yields and flow harmonics. For initial eccentricities, we use the results of Monte Carlo Glauber model. We fix the blast-wave model parameters by fitting the transverse momentum spectra of identified particles at the Large Hadron Collider (LHC) and demonstrate that this leads to a fairly good agreement with transverse momentum distribution of elliptic and triangular flow for various centralities. Within this viscous blast-wave model, we estimate the shear viscosity to entropy density ratio $\eta/s\simeq 0.24$ at the LHC. [1] A. Jaiswal and V. Koch, arXiv:1508.05878 [nucl-th].

Primary author

Dr Amaresh Jaiswal (GSI Helmholtzzentrum für Schwerionenforschung)

Co-author

Prof. Volker Koch (Lawrence Berkeley National Laboratory)

Presentation materials