[Brahms-l] Fw: Release of STAR paper on Phi meson production

FYI
----------------------------------------------------------------
Flemming Videbaek
Physics Department
Brookhaven National Laboratory

e-mail: videbaek@bnl.gov
phone: 631-344-4106
----- Original Message ----- 
From: "Hallman, Timothy J" <hallman@bnl.gov>
To: "Kirk, Thomas B" <tkirk@bnl.gov>
Cc: <zajc@bnl.gov>; "Videbaek, Flemming" <videbaek@bnl.gov>; "Baker, Mark"
<mdbaker@bnl.gov>
Sent: Thursday, April 08, 2004 11:40 AM
Subject: Release of STAR paper on Phi meson production


> Dear Tom, Bill, Flemming, and Mark,
>
> I am pleased to announce STAR's intention to submit a new
> paper on "Phi meson production in Au + Au and p + p
> collisions at sqrt s_NN = 200 GeV" to Physical Review Letters
> one week from today. The title and abstract for the paper
> are enclosed.
>
>                         Sincerely,
>
>                          Tim
>
> "Phi meson production in Au + Au and p + p collisions
>  at sqrt s_NN = 200 GeV"
>
> We report the STAR measurement of Phi meson production
> in Au + Au and p + p collisions at sqrt s_NN = 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 be 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
> (<N_bin>). The systematics of <p_t> 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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