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 Roland; G Roland; 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

doi:10.1103/PhysRevLett.89.222301

Pseudorapidity and centrality dependence of the collective flow of charged particles in Au+Au collisions at sqrt[s(NN)]=130 GeV

Phys Rev Lett. 2002 Nov 25;89(22):222301. doi: 10.1103/PhysRevLett.89.222301. Epub 2002 Nov 7.

Authors

B B Back¹, 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 Roland, G Roland, 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

Affiliation

¹ Physics Division, Argonne National Laboratory, Illinois 60439-4843, USA.

PMID: 12485063
DOI: 10.1103/PhysRevLett.89.222301

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.