Scaling Properties of Hyperon Production in Au+Au Collisions at sNN=200GeV
Abstract
We present the scaling properties of Λ, Ξ, and Ω in midrapidity Au+Au collisions at the Brookhaven National Laboratory Relativistic Heavy Ion Collider at sNN=200GeV. The yield of multistrange baryons per participant nucleon increases from peripheral to central collisions more rapidly than that of Λ, indicating an increase of the strange-quark density of the matter produced. The strange phase-space occupancy factor γs approaches unity for the most central collisions. Moreover, the nuclear modification factors of p, Λ, and Ξ are consistent with each other for 2<pT<5GeV/c in agreement with a scenario of hadron formation from constituent quark degrees of freedom.
- Publication:
-
Physical Review Letters
- Pub Date:
- February 2007
- DOI:
- 10.1103/PhysRevLett.98.062301
- arXiv:
- arXiv:nucl-ex/0606014
- Bibcode:
- 2007PhRvL..98f2301A
- Keywords:
-
- 25.75.Dw;
- Particle and resonance production;
- Nuclear Experiment
- E-Print:
- 6 pages, 3 figures, submitted to PRL