Strange Particle Spectra from STAR in Au-Au Collisions at (SNN)~(1/2) = 130GeV

摘要

Strange particle spectra as measured by the STAR detector at RHIC in Au-Au collisions at (SNN)~(1/2) = 130 GeV are presented. The m_t spectra for charged and neutral kaons, Λ's and Ξ's, plus their anti-particles suggest a large flow that increases with centrality. Similar to the SPS, the strange baryons freeze-out with an apparent lower temperature, indicating an earlier freeze-out time and/or a smaller radial flow. The resonance K~(*0) particle is used to study the apparent freeze-out time of the collision.