Ratios of charged antiparticles-to-particles near mid-rapidity in Au plus Au collisions at root s(NN)=130 GeV - art. no. 102301

Citation
Bb. Back et al., Ratios of charged antiparticles-to-particles near mid-rapidity in Au plus Au collisions at root s(NN)=130 GeV - art. no. 102301, PHYS REV L, 8710(10), 2001, pp. 2301
Citations number
22
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
0031-9007 → ACNP
Volume
8710
Issue
10
Year of publication
2001
Database
ISI
SICI code
0031-9007(20010903)8710:10<2301:ROCANM>2.0.ZU;2-3
Abstract
We have measured the ratios of antiparticles to particles for charged pions , kaons, and protons near mid-rapidity in central Au + Au collisions at roo ts(NN) = 130 GeV. We observe (pi (-))/(pi (+)) = 1.00 +/- 0.01(stat) +/- 0. 02(syst), (K-)/(K+) = 0.91 +/- 0.07(stat) +/- 0.06(syst), and [(p) over bar )/(p) = 0.60 +/- 0.04(stat) +/- 0.06(syst). The (K-)/(K+) and ((p) over bar )/(p) ratios give a consistent estimate of the baryo-chemical potential mu (B) of 45 MeV, a factor of 5-6 smaller than in central Pb + Pb collisions a t roots(NN) = 17.2 GeV.