Anisotropic flow of identified particles in Pb--Pb collisions at $\sqrt{s_{_{\rm NN}}} =$ 2.76 TeV with the ALICE detector

TL;DR

This paper reports on measurements of anisotropic flow for various identified particles in Pb--Pb collisions at 2.76 TeV, comparing results with RHIC data and hydrodynamic models to understand the collective behavior of the quark-gluon plasma.

Contribution

It provides new measurements of anisotropic flow for a wide range of identified particles at LHC energies, including strange and multi-strange particles, and compares them with models and lower energy data.

Findings

Mass splitting observed in flow coefficients.

Scaling with number of constituent quarks confirmed.

Comparison shows agreement with hydrodynamic models.

Abstract

The measurement of anisotropic flow of identified particles, including charged pion, kaon, (anti-)proton as well as strange and multi-strange particles (${\rm K_{S}^{0}}$, ${\rm \Lambda}$, ${\rm \Xi}$ and ${\rm \Omega}$) are measured in Pb--Pb collisions at $\sqrt{s_{_{{\rm NN}}}}$ = 2.76 TeV with the ALICE detector. The results are compared to measurements at RHIC and hydrodynamic model calculations. The mass splitting and the scaling with the number of constituent quarks of the anisotropic flow are also discussed.