# 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!

## (3+1)D hybrid model of heavy-ion collisions at BES energies with dynamical sources

16 May 2018, 11:10
20m
Sala Mosaici-1, 3rd Floor (Palazzo del Casinò)

### Sala Mosaici-1, 3rd Floor

#### Palazzo del Casinò

Parallel Talk Collective dynamics

### Speaker

Lipei Du (The Ohio State University)

### Description

At Relativistic Heavy Ion Collider (RHIC) Beam Energy Scan (BES) energies, the dynamics of the pre-equilibrium stage and the effects resulting from a nonzero net baryon current become critical components of the dynamical evolution of the collision fireball. We develop a (3+1)-dimensional hybrid evolution model with dynamical sources for both energy-momentum and the net baryon current. During an initial pre-equilibrium stage based on UrQMD, the four-momenta and baryon numbers carried by secondary particles created within UrQMD are fed continuously, after a short thermalization time, into a (3+1)-dimensional viscous hydrodynamic evolution module. This initialization provides an alternate model to those recently studied by Petersen ${\it et~al}$. [1] and Shen and Schenke [2]: It thermalizes more rapidly than Ref. [1] and yields a different initial net baryon distribution than Ref. [2]. We present and compare with these previous approaches the dynamical evolution of all thermodynamic and dissipative degrees of freedom, including net baryon diffusion. The sensitivity of experimental observables (spectra and anisotropic flows) to the details of the pre-equilibrium stage and to baryon diffusion will also be demonstrated.

[1] H. Petersen ${\it et~al.}$, Phys. Rev. C $\mathbf{78}$, 044901 (2008).

[2] C. Shen and B. Schenke, arXiv:1710.00881 [nucl-th].

Content type Theory Presenter name already specified

### Primary author

Lipei Du (The Ohio State University)

### Co-authors

Gojko Vujanovic (The Ohio State University) Ulrich Heinz (The Ohio State University)