# Quark Matter 2018

13-19 May 2018
Venice, Italy
Europe/Zurich timezone
The organisers warmly thank all participants for such a lively QM2018! See you in China in 2019!

## Bulk observables within hybrid approach for heavy ion collisions, at RHIC and the LHC, with SMASH afterburner

15 May 2018, 17:00
2h 40m
First floor and third floor (Palazzo del Casinò)

### First floor and third floor

#### Palazzo del Casinò

Poster Collective dynamics

### Speaker

Dr Sangwook Ryu (Goethe-Universität Frankfurt (FIAS))

### Description

We present a model of the dynamical evolution of relativistic heavy ion collisions, which combines second-order viscous hydrodynamics and microscopic transport. In particular, we present a hybrid approach with MUSIC hydrodynamics, particlization with improved treatment of resonance masses based on spectral functions, and SMASH (Simulating Many Accelerated Strongly-interacting Hadrons) afterburner. In this work, we focus on low-$p_T$ hadronic observables --- identified hadron $p_T$ spectra and anisotropic flow coefficients. Given that the low-$p_T$ bulk dynamics in hadronic re-scattering is dominated by resonance excitations and decays, it is expected that implementation of mass sampling at the particlization and better treatment of resonances in microscopic transport play important roles in the late stage of heavy ion collisions. This motivates us to compare other hybrid approaches, such as MUSIC+UrQMD, to MUSIC+SMASH hybrid with an emphasis put on the importance of mass sampling at the particlization and effect of hadronic re-scatterings.

Content type Theory Presenter name already specified

### Primary author

Dr Sangwook Ryu (Goethe-Universität Frankfurt (FIAS))

### Co-authors

Jan Staudenmaier (Goethe University Frankfurt (FIAS)) Gojko Vujanovic (The Ohio State University)