Phi-meson Production in Heavy-Ion Collisions at RHIC

Abstract

We present the first elliptic flow, $v_2$, measurement for the $\varphi$-meson in Au+Au collisions at $\sqrt{s_{NN}}$=200 GeV. At low $p_T$ (<2 GeV/c), the $v_2$ is consistent with mass ordering expected from hydrodynamics, while at higher $p_T$ (>4 GeV/c), it follows the same trend as the $K_S^0$ $v_2$ and a parameterization for number of quarks = 2. The nuclear modification factor, $R_{CP}$, has also been measured and it follows the same trend as the $K_S^0$ rather than the $\Lambda$ which confirms the baryon/meson-type dependence of $R_{CP}$ at RHIC. A model based on the recombination of thermal s-quarks describes the central $\varphi$-meson $p_T$ spectrum as well as the baryon/meson ratio of $\Omega /\varphi$ up to $p_T$ ~4 GeV/c.

arXiv commentSubmitted to J. Phys. G (Proceedings of the 9th International Conference on Strangeness in Quark Matter, Los Angeles, USA, March 26-31) 4 pages, 3 figures

References in corpus (9)

• Methods for analyzing anisotropic flow in relativistic nuclear collisions
• Hadron production in heavy ion collisions: Fragmentation and recombination from a dense parton phase
• Elliptic flow at large transverse momenta from quark coalescence
• Particle-type dependence of azimuthal anisotropy and nuclear modification of particle production in Au+Au collisions at s(NN)**(1/2) = 200-GeV
• Anisotropic flow
• Multi-strange baryon elliptic flow in Au+Au collisions at sqrt(s_NN)= 200 GeV
• Phi meson production in Au+Au and p+p collisions at sqrt (s)=200 GeV
• K(892)* Resonance Production in Au+Au and p+p Collisions at sqrt(sNN) = 200 GeV at RHIC
• Resonance decay effects on anisotropy parameters

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• Recent Results on Strangeness Production at RHIC
• The phi meson at high temperatures and densities
• Hadronization Approach for a Quark-Gluon Plasma Formed in Relativistic Heavy Ion Collisions
• SQM 2006: Theory Summary and Perspectives