Ratios of Charged Antiparticles-to-Particles near Mid-Rapidity in Au + Au Collisions at (sNN) = 130 GeV
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 (sNN) = 130 GeV. We observe <π->/<π+> = 1.00+/-0.01(stat)+/-0.02(syst), <K->/<K+> = 0.91+/-0.07(stat)+/-0.06(syst), and <p&>/
= 0.60+/-0.04(stat)+/-0.06(syst). The <K->/<K+> and <p&>/ ratios give a consistent estimate of the baryo-chemical potential μB of 45 MeV, a factor of 5-6 smaller than in central Pb+Pb collisions at (sNN) = 17.2 GeV.- Publication:
-
Physical Review Letters
- Pub Date:
- September 2001
- DOI:
- 10.1103/PhysRevLett.87.102301
- arXiv:
- arXiv:hep-ex/0104032
- Bibcode:
- 2001PhRvL..87j2301B
- Keywords:
-
- High Energy Physics - Experiment;
- Nuclear Experiment
- E-Print:
- 4 pages