# XII Workshop on Particle Correlations and Femtoscopy

Jun 12 – 16, 2017
Other Institutes
Europe/Zurich timezone

## Azimuthally differential pion femtoscopy with respect to second and third order event planes and event shape engineering in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV

Jun 14, 2017, 3:20 PM
20m
Other Institutes

#### Other Institutes

Nikhef Science Park 105 1098XG Amsterdam The Netherlands

### Speaker

Naoto Tanaka (University of Tsukuba (JP))

### Description

Azimuthally differential HBT is a powerful tool for investigating the source shape at freeze out.
In heavy ion collisions, the medium expansion through radial and anisotropic flow has been observed.
These hydrodynamic expansions result the deformation of the initial geometry.
Studying the deformation of the source shape by such strong expansion is the key to quantify the dynamics of the system evolution.

The azimuthal anisotropy flow coefficients $v_{n}$ fluctuate significantly even within a same centrality range due to fluctuations in the participant shape.

Recently, event shape engineering (ESE) has been suggested as a powerful tool to control event-by-event flow fluctuations
by selecting the magnitude of flow vectors $q_{2}$ and $q_{3}$.
Azimuthally differential HBT with ESE offers the detailed analysis of the relation between anisotropic flow and
the deformation of source shape.

In this talk, we present azimuthally differential pion femtoscopy with respect to second and third order event planes and
the study of how the source eccentricity changes with large $q_{2}$ and $q_{3}$ cuts.

List of tracks Femtoscopy at RHIC and LHC: links to QGP physics

### Primary author

Naoto Tanaka (University of Tsukuba (JP))