$K^{\ast }(892)$ Production in Au+Au and pp Collisions at $\sqrt{s_{NN}}$ = 200GeV at STAR

Abstract

Mid-rapidity $K^{\ast 0}(892)\to K\pi$ and $K^{\ast \pm }(892)\to K_S^0{\pi }^{\pm }$ are measured in Au+Au and pp collisions at $\sqrt{s_{NN}}$=200GeV using the STAR detector at RHIC. The $K^{\ast 0}(892)$ mass is systematically shifted at small transverse momentum for both Au+Au and pp collisions. The $K^{\ast 0}(892)$ transverse mass spectra are measured in Au+Au collisions at different centralities and in pp collisions. The $K^{\ast 0}(892)$ mean transverse momentum as a function of the collision centrality is compared to those of identified ${\pi }^{-}$, $K^{-}$ and $\bar{p}$. The $K^{\ast }/K$ and $\varphi /K^{\ast }$ ratios are compared to measurements in A+A, $pp$, $\bar{p}p$, $e^{+}{e}^{-}$ collisions at various colliding energies. The physics implications of these measurements are also discussed.

6 pages, 4 figures, proceedings of Strange Quarks in Matter (SQM2003), Atlantic Beach, USA, to be published in J. Phys. G

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Cited by in corpus (7)

• What do we learn from Resonance Production in Heavy Ion Collisions?
• Resonance Production
• Strange Resonance Production in p+p and Au+Au Collisions at RHIC Energies
• Resonance production in heavy ion collisions
• Freeze-out dynamics at RHIC
• Open Charm Production at STAR
• Resonance Production in Heavy Ion Collisions