Nonflow "factorization" and a novel method to disentangle anisotropic flow and nonflow

Abstract

Presently flow and nonflow cannot be separated experimentally. Using Pythia simulations of p+p collisions we show that nonflow approximately factorizes. This fact may be used to disentangle flow and nonflow in heavy ion data by performing a two-component factorization fit to Fourier coefficients of two-particle correlations.

6 pages, 4 figures. Included discussion of the higher harmonic anisotropic flow and two-particle azimuthal correlations measured in Pb+Pb collisions at the LHC

References in corpus (8)

• PYTHIA 6.4 Physics and Manual
• Systematic Measurements of Identified Particle Spectra in pp, d+Au and Au+Au Collisions from STAR
• Elliptic and triangular flow in event-by-event (3+1)D viscous hydrodynamics
• Harmonic decomposition of two-particle angular correlations in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Effect of flow fluctuations and nonflow on elliptic flow methods
• Systematic parameter study of hadron spectra and elliptic flow from viscous hydrodynamic simulations of Au+Au collisions at sqrt(s_NN) = 200 GeV
• Initial eccentricity fluctuations and their relation to higher-order flow harmonics
• Azimuth quadrupole component spectra on transverse rapidity ${\mathbf{y}}_{\mathbf{t}}$ for identified hadrons from Au-Au collisions at $\sqrt{s_{NN}}=$ 200 GeV

Cited by in corpus (14)

• Breaking of factorization of two-particle correlations in hydrodynamics
• Experimental searches for the chiral magnetic effect in heavy-ion collisions
• Theoretical and Experimental Constraints for the Equation of State of Dense and Hot Matter
• Charge-dependent pair correlations relative to a third particle in $p$+Au and $d$+Au collisions at RHIC
• Disentangling flow and nonflow correlations via Bayesian unfolding of the event-by-event distributions of harmonic coefficients in ultrarelativistic heavy-ion collisions
• Novel Phenomena in Particle Correlations in Relativistic Heavy-Ion Collisions
• Flow Fluctuations from Early-Time Correlations in Nuclear Collisions
• Decomposition of flow and nonflow in relativistic heavy-ion collisions
• Robustness of principal component analysis on harmonic flow in heavy ion collisions
• Review of nonflow estimation methods and uncertainties in relativistic heavy-ion collisions
• Jet Quenching and Correlations
• Fourier coefficients of noninterdependent collective motions in heavy-ion collisions
• Systematic study of flow vector fluctuations in $\sqrt{{\text{s}}_{{}_{\mathbf{NN}}}}=5.02$ TeV Pb-Pb collisions
• Investigations of $p$+Pb Collisions at Perturbative and Non-Perturbative QCD Scales