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26 April 2024

» pubmed » pmid12485063

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Pseudorapidity and centrality dependence of the collective flow of charged particles in Au+Au collisions at sqrt[s(NN)]=130 GeV
B B Back ; M D Baker ; D S Barton ; R R Betts ; R Bindel ; A Budzanowski ; W Busza ; A Carroll ; M P Decowski ; E Garcia ; N George ; K Gulbrandsen ; S Gushue ; C Halliwell ; J Hamblen ; C Henderson ; D Hofman ; R S Hollis ; R Hołyński ; B Holzman ; A Iordanova ; E Johnson ; J Kane ; J Katzy ; N Khan ; W Kucewicz ; P Kulinich ; C M Kuo ; W T Lin ; S Manly ; D McLeod ; J Michałowski ; A Mignerey ; R Nouicer ; A Olszewski ; R Pak ; I C Park ; H Pernegger ; C Reed ; L P Remsberg ; M Reuter ; C Rol ; G Rol ; L Rosenberg ; J Sagerer ; P Sarin ; P Sawicki ; W Skulski ; S G Steadman ; P Steinberg ; G S F Stephans ; M Stodulski ; A Sukhanov ; J-L Tang ; R Teng ; A Trzupek ; C Vale ; G J Van Nieuwenhuizen ; R Verdier ; B Wadsworth ; F L H Wolfs ; B Wosiek ; K Woźniak ; A H Wuosmaa ; B Wysłouch ;
Date:	25 Nov 2002
Journal:	Phys Rev Lett, 89 (22), 222301
Abstract:	This paper describes the measurement of collective flow for charged particles in Au+Au collisions at sqrt[s(NN)]=130 GeV using the PHOBOS detector at the Relativistic Heavy Ion Collider (RHIC). The measured azimuthal hit anisotropy is presented over a wide range of pseudorapidity (-5.0<eta<5.3) for the first time at this energy. The result, averaged over momenta and particle species, is observed to reach 7% for peripheral collisions at midrapidity, falling off with centrality and increasing \|eta\|. These results call into question the common assumption of longitudinal boost invariance over a large region of rapidity in RHIC collisions.
Source:	PubMed, pmid12485063
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