Charged-particle pseudorapidity density distributions from 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; G A Heintzelman; C Henderson; D J Hofman; R Hołyński; B Holzman; E Johnson; J L Kane; J Katzy; N Khan; W Kucewicz; P Kulinich; W T Lin; S Manly; D McLeod; J Michałowski; A C Mignerey; J Mülmenstädt; R Nouicer; A Olszewski; R Pak; I C Park; H Pernegger; C Reed; L P Remsberg; M Reuter; C Roland; G Roland; L Rosenberg; P Sarin; P Sawicki; W Skulski; S G Steadman; P Steinberg; G S Stephans; M Stodulski; A Sukhanov; J L Tang; R Teng; A Trzupek; C Vale; G J van Nieuwenhuizen; R Verdier; B Wadsworth; F L Wolfs; B Wosiek; K Woźniak; A H Wuosmaa; B Wysłouch

doi:10.1103/PhysRevLett.87.102303

Charged-particle pseudorapidity density distributions from Au+Au collisions at sqrt[s(NN)]=130 GeV

Phys Rev Lett. 2001 Sep 3;87(10):102303. doi: 10.1103/PhysRevLett.87.102303. Epub 2001 Aug 21.

Authors

Affiliation

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

PMID: 11531476
DOI: 10.1103/PhysRevLett.87.102303

Abstract

The charged-particle pseudorapidity density dN(ch)/d eta has been measured for Au+Au collisions at sqrt[s(NN)] = 130 GeV at RHIC, using the PHOBOS apparatus. The total number of charged particles produced for the 3% most-central Au+Au collisions for /eta/<or=5.4 is found to be 4200+/-470. The evolution of dN(ch)/d eta with centrality is discussed, and compared to model calculations and to data from proton-induced collisions. The data show an enhancement in charged-particle production at midrapidity, while in the fragmentation regions, the results are consistent with expectations from pp and pA scattering.