A data-driven method was applied to Au+Au collisions at made with the STAR detector at RHIC to isolate pseudorapidity distance Δη-dependent and Δη-independent correlations by using two- and four-particle azimuthal cumulant measurements. We identified a Δη-independent component of the correlation, which is dominated by anisotropic flow and flow fluctuations. It was also found to be independent of η within the measured range of pseudorapidity . In 20–30% central Au+Au collisions, the relative flow fluctuation was found to be for particles with transverse momentum less than . The Δη-dependent part, attributed to nonflow correlations, is found to be relative to the flow of the measured second harmonic cumulant at .

Isolation of flow and nonflow correlations by two- and four-particle cumulant measurements of azimuthal harmonics in sNN=200GeV Au+Au collisions

Contin, G.;di Ruzza, B.;
2015-01-01

Abstract

A data-driven method was applied to Au+Au collisions at made with the STAR detector at RHIC to isolate pseudorapidity distance Δη-dependent and Δη-independent correlations by using two- and four-particle azimuthal cumulant measurements. We identified a Δη-independent component of the correlation, which is dominated by anisotropic flow and flow fluctuations. It was also found to be independent of η within the measured range of pseudorapidity . In 20–30% central Au+Au collisions, the relative flow fluctuation was found to be for particles with transverse momentum less than . The Δη-dependent part, attributed to nonflow correlations, is found to be relative to the flow of the measured second harmonic cumulant at .
File in questo prodotto:
File Dimensione Formato  
1-s2.0-S0370269315002762-main_isolation.pdf

accesso aperto

Tipologia: Documento in Versione Editoriale
Licenza: Creative commons
Dimensione 502.49 kB
Formato Adobe PDF
502.49 kB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2942064
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 12
  • ???jsp.display-item.citation.isi??? 12
social impact