Femtoscopy of the system shape fluctuations in heavy ion collisions

TL;DR

This paper explores how initial density fluctuations in heavy ion collisions influence the system's shape and flow, proposing interferometry methods to measure these fluctuations and gain insights into the system's dynamical properties.

Contribution

It introduces a novel approach to measure initial geometry fluctuations through particle interferometry in heavy ion collisions.

Findings

Initial density fluctuations affect system shape at freeze-out

Interferometry can detect shape and velocity fluctuations

Provides insights into system viscosity and dynamics

Abstract

Dipole, triangular, and higher harmonic flow that have an origin in the initial density fluctuations has gained a lot of attention as they can provide additional important information about the dynamical properties (e.g. viscosity) of the system. The fluctuations in the initial geometry should be also reflected in the detail shape and velocity field of the system at freeze-out. In this talk I discuss the possibility to measure such fluctuations by means of identical and non-identical particle interferometry.