The Glauber model and flow analysis with Pb-Pb collisions at $ \sqrt{s_{\rm NN}}$=2.76 TeV

TL;DR

This paper analyzes Pb-Pb collisions at 2.76 TeV, using the Glauber model and flow analysis techniques to understand the initial geometry and elliptic flow in heavy ion collisions.

Contribution

It introduces Monte Carlo simulations of the Glauber model and applies Fourier decomposition to extract elliptic flow from correlation functions in heavy ion collisions.

Findings

Glauber model simulations of initial collision geometry

Extraction of elliptic flow via Fourier analysis

Separation of non-flow effects from flow signals

Abstract

This work presents data analysis on Pb-Pb collisions at $\sqrt{s_{\rm NN}}$=2.76 TeV with centrality $40\%-50\%$. We present introduction and Monte-Carlo simulation results of the Glauber model, which shed light on the initial geometric configuration of heavy ion collisions. Three-dimensional correlation function is plotted, and Fourier decomposition is carried out in order to obtain elliptic flow. Based on the assumption that non-flow effect is less prominent in long-range area, we separate it from the second Fourier decomposition of two-particle correlation function by making polynomial curve fitting.