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Phi meson production in Au+Au and p+p collisions at sqrt (s)=200 GeV

J. Adams et al
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Abstract

We report the STAR measurement of Phi meson production in Au+Au and p+p collisions at sqrt (s)=200 GeV. Using the event mixing technique, the Phi spectra and yields are obtained at mid-rapidity for five centrality bins in Au+Au collisions and for non-singly-diffractive p+p collisions. It is found that the Phi transverse momentum distributions from Au+Au collisions are better fitted with a single-exponential while the p+p spectrum is better described by a double-exponential distribution. The measured nuclear modification factors indicate that Phi production in central Au+Au collisions is suppressed relative to peripheral collisions when scaled by the number of binary collisions. The systematics of versus centrality and the constant Phi/K- ratio versus beam species, centrality, and collision energy rule out kaon coalescence as the dominant mechanism for Phi production.

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J. Adams et al. 2004-06-07. Phi meson production in Au+Au and p+p collisions at sqrt (s)=200 GeV. https://doi.org/10.1016/j.physletb.2004.12.082

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