# $\phi$ meson production in Au+Au and p+p collisions at $\sqrt{s_{NN}}$= 200 GeV

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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Journal articles
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http://hal.in2p3.fr/in2p3-00023325
Contributor : Yvette Heyd <>
Submitted on : Monday, November 22, 2004 - 9:18:00 AM
Last modification on : Friday, April 9, 2021 - 11:26:02 AM

### Citation

J. Adams, C. Adler, M.M. Aggarwal, Z. Ahammed, J. Amonett, et al.. $\phi$ meson production in Au+Au and p+p collisions at $\sqrt{s_{NN}}$= 200 GeV. Physics Letters B, Elsevier, 2005, 612, pp.181-189. ⟨10.1016/j.physletb.2004.12.082⟩. ⟨in2p3-00023325⟩

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