New flow observables

TL;DR

This paper introduces new correlation observables to analyze event-by-event fluctuations in collective flow patterns in high-energy nuclear collisions, providing tools for experimental measurement at RHIC and LHC.

Contribution

It proposes novel correlation observables for characterizing initial density fluctuations and discusses their experimental measurement methods.

Findings

New correlation observables for flow fluctuations

Feasibility of measuring these observables at RHIC and LHC

Enhanced understanding of initial state fluctuations

Abstract

Event-by-event fluctuations of the initial transverse density profile result in a collective flow pattern which also fluctuates event by event. We propose a number of new correlation observables to characterize these fluctuations and discuss how they should be analyzed experimentally. We argue that most of these quantities can be measured at RHIC and LHC.