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Abstract: (arXiv)
We report on the observed signals of K⋆0(892)→πK{K^{\star0}(892)}\to\pi K and ϕ(1020)→K+K−\phi(1020)\to K^{+}K^{-} using the mixed-event method with powerful statistics from the large acceptance and highly efficient STAR TPC. Preliminary results from the first observation of such states from the year-one STAR data in sNN=130\sqrt{s_{NN}}=130 GeV Au-Au collisions are presented. The K⋆0/h−K^{\star0}/h^{-} ratios with an assumed K⋆0K^{\star0} pTp_{T} inverse slope of 300MeV are compatible with that from pp at ISR. For 14% central Au+Au collisions, we observe K⋆0/h−=0.060±0.007(stat)K^{\star0}/h^{-}=0.060\pm0.007(stat) and K⋆0ˉ/h−=0.058±0.007(stat)\bar{K^{\star0}}/h^{-}=0.058\pm0.007(stat). We show that Λˉ/Λ=0.77±0.07(stat)\bar{\Lambda}/\Lambda=0.77\pm0.07(stat) from this method is consistent with the measurement via decay topology.
Note:
  • 4 pages, 4 figures, Quark Matter 2001, contributed talk; typos of K*/h- numbers in abstract fixed
  • talk: Stony Brook 2001/01/15
  • scattering: heavy ion
  • gold
  • hadron: multiple production
  • production: strangeness
  • K*(892): hadronic decay
  • Phi(1020): hadronic decay
  • yield: (K*(892) negative particle)
  • yield: (Lambda Antilambda)
  • transverse momentum: spectrum