Charged-particle multiplicity near midrapidity in central Au plus Au collisions at root(NN)-N-s=56 and 130 GeV

Citation
Bb. Back et al., Charged-particle multiplicity near midrapidity in central Au plus Au collisions at root(NN)-N-s=56 and 130 GeV, PHYS REV L, 85(15), 2000, pp. 3100-3104
Citations number
10
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
0031-9007 → ACNP
Volume
85
Issue
15
Year of publication
2000
Pages
3100 - 3104
Database
ISI
SICI code
0031-9007(20001009)85:15<3100:CMNMIC>2.0.ZU;2-D
Abstract
We present the first measurement of pseudorapidity densities of primary cha rged particles near midrapidity in Au + Au collisions at root S-NN = 56 and 130 GeV. For the most central collisions, we find the charged-particle pse udorapidity density to be dN/d eta/(/eta/<t) = 408 +/- 12(stat) +/- 30(syst ) at 56 GeV and 555 +/- 12(stat) +/- 35(syst) at 130 GeV, values that are h igher than any previously observed in nuclear collisions. Compared to proto n-antiproton collisions, our data show an increase in the pseudorapidity de nsity per participant by more than 40% at the higher energy.