Studying Heavy Ion Collisions Using Methods From Cosmic Microwave Background (CMB) Analysis

J J Gaardhøje,H Tabassam,L Bravina,Y Foka,S Kabana

doi:10.1051/epjconf/20147100061

Abstract

We present and discuss a framework for studying the morphology of high- multiplicity events from relativistic heavy ion collisions using methods commonly em- ployed in the analysis of the photons from the Cosmic Microwave Background (CMB). The analysis is based on the decomposition of the distribution of the number density of (charged) particles expressed in polar and azimuthal coordinates into a sum of spherical harmonic functions. We present an application of the method exploting relevant symme- tries to the study of azimuthal correlations arizing from collective flow among charged particles produced in relativistic heavy ion collisions. We discuss perspectives for event- by-event analyses, which with increasing collision energy will eventually open entirely new dimensions in the study of ultrarelaticistic heavy ion reactions.

Highlights

We present and discuss a framework for studying the morphology of highmultiplicity events from relativistic heavy ion collisions using methods commonly employed in the analysis of the photons from the Cosmic Microwave Background (CMB)
We present an application of the method exploting relevant symmetries to the study of azimuthal correlations arizing from collective flow among charged particles produced in relativistic heavy ion collisions
Many advanced techniques have been developed in the last decade to analyse the single cosmic event that we have at our disposal, our Universe, through the cosmic microwave background (CMB) radiation which carries the imprint of the conditions prevailing in the Universe shortly after the Big Bang

Summary

Introduction

Many advanced techniques have been developed in the last decade to analyse the single cosmic event that we have at our disposal, our Universe, through the cosmic microwave background (CMB) radiation which carries the imprint of the conditions prevailing in the Universe shortly after the Big Bang. We present and discuss a framework for studying the morphology of highmultiplicity events from relativistic heavy ion collisions using methods commonly employed in the analysis of the photons from the Cosmic Microwave Background (CMB). The analysis is based on the decomposition of the distribution of the number density of (charged) particles expressed in polar and azimuthal coordinates into a sum of spherical harmonic functions.

Results

Conclusion