System Size, Energy, Pseudorapidity, and Centrality Dependence of Elliptic Flow

Journal Article · Fri Jun 15 04:00:00 EDT 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.98.242302· OSTI ID:20953283

Alver, B; Ballintijn, M; Busza, W; Decowski, M P; Gulbrandsen, K; Henderson, C; Kane, J L; Kulinich, P; Li, W; Loizides, C; Reed, C; Roland, C; Roland, G; Stephans, G S. F.; Vale, C; Nieuwenhuizen, G J. van; Vaurynovich, S S; Verdier, R; Veres, G I; Wenger, E ^[1]

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1. Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307 (United States)

This Letter presents measurements of the elliptic flow of charged particles as a function of pseudorapidity and centrality from Cu-Cu collisions at 62.4 and 200 GeV using the PHOBOS detector at the Relativistic Heavy Ion Collider. The elliptic flow in Cu-Cu collisions is found to be significant even for the most central events. For comparison with the Au-Au results, it is found that the detailed way in which the collision geometry (eccentricity) is estimated is of critical importance when scaling out system-size effects. A new form of eccentricity, called the participant eccentricity, is introduced which yields a scaled elliptic flow in the Cu-Cu system that has the same relative magnitude and qualitative features as that in the Au-Au system.

• OSTI ID: 20953283
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 24 Vol. 98; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BROOKHAVEN RHIC
CHARGED PARTICLES
COLLIDING BEAMS
COPPER 63 BEAMS
COPPER 63 REACTIONS
COPPER 63 TARGET
GEV RANGE 10-100
GEV RANGE 100-1000
GOLD 197 BEAMS
GOLD 197 REACTIONS
GOLD 197 TARGET
PARTICLE RAPIDITY