# Quark Matter 2014 - XXIV International Conference on Ultrarelativistic Nucleus-Nucleus Collisions

19-24 May 2014
Europe/Zurich timezone

## QGP properties from flow and correlations

21 May 2014, 12:50
20m

### europium

Contributed Talk Collective Dynamics

### Speaker

Chiho Nonaka (Nagoya University)

### Description

Recently the results of azimuthal HBT measurements with respect to the second and third order event plane are presented by PHENIX [1]. They extract $\epsilon_2$ and $\epsilon_3$ from the HBT radii which contain information about not only the source shape at freezeout but also the space-time evolution of QGP matter. They show the relation between initial $\epsilon_{2, 3}$ which are obtained using a Glauber model and final $\epsilon_{2,3}$ which are extracted from the HBT radii. They find that the final $\epsilon_2$ from the HBT radii is finite and smaller than the initial $\epsilon_2$. On the other hand, the final $\epsilon_3$ is vanishing, in spite of existence of finite initial $\epsilon_3$. The interesting different response of $\epsilon_2$ and $\epsilon_3$ during space-time evolution gives us a clue to understand the detailed QGP properties. For analyses of such high statistics experimental results, we develop a state of the art numerical scheme of causal viscous hydrodynamics for relativistic heavy ion collisions, which has a shock-wave capturing scheme and less numerical dissipation [2]. Furthermore, using the hydrodynamic algorithm, we construct a hybrid model of hydrodynamic model plus UrQMD to include the realistic freezeout processes. Using the model we investigate the time evolution of spatial anisotropies $\epsilon_n$. We find that the sign of $\epsilon_3$ changes from positive to negative during the space-time evolution, which suggests a solution of the vanishing final $\epsilon_3$ from the HBT radii by PHENIX. From detailed analyses from flow and correlations, we discuss the initial conditions of hydrodynamic model and the detailed QGP properties such as transport coefficients. [1] T. Niida for the PHENIX collaboration, Nucl. Phys. A 904-905C (2013) pp. 439-442 [arXiv:1304.2876] [2] Y. Akamatsu, S. Inutsuka, C. Nonaka, M. Takamoto, J. Comp. Phys. (2014), pp. 34-54, [arXiv:1302.1665]
On behalf of collaboration: None

### Primary author

Chiho Nonaka (Nagoya University)

### Co-authors

Mr Jonah Bernhard (Duke Univesrity) Prof. Steffen A. Bass (Duke University) Yukinao Akamatsu (Nagoya University)

 Slides