[Brahms-l] Fw: New STAR Paper on Phi Meson Production

FYI
--------------------------------------------
Flemming Videbaek
Physics Department 
Bldg 510-D
Brookhaven National Laboratory
Upton, NY11973

phone: 631-344-4106
cell:       631-681-1596
fax:        631-344-1334
e-mail: videbaek @ bnl gov

Sent: Tuesday, March 13, 2007 2:54 PM
Subject: New STAR Paper on Phi Meson Production


> Dear Peter, Barbara, Flemming, and Wit:
> 
> It is my pleasure to announce STAR's intention to submit the
> following paper to Phys. Rev. Letters in one week's time:
> 
> "Partonic flow and phi-meson production in Au+Au collisions at
> sqrt s_NN = 200 GeV"
> 
> The abstract is enclosed.
> 
>                      Sincerely,
> 
>                      Tim Hallman
> 
> *Abstract*
> 
> We present first measurements of the $\phi$-meson elliptic flow
> ($v_{2}(p_{T})$) and high statistics $p_{T}$ distributions for
> different centralities from $\sqrt{s_{NN}}$ = 200 GeV Au+Au collisions
> at RHIC. In minimum bias collisions the $v_{2}$ of the $\phi$ meson is
> consistent with the trend observed for mesons. The ratio of the yields
> of the $\Omega$ to those of the $\phi$ as a function of transverse
> momentum is consistent with a model based on the recombination of
> thermal $s$ quarks up to $p_{T}\sim 4$ GeV/$c$, but disagrees at
> higher momenta. The nuclear modification factor ($R_{CP}$) of $\phi$
> follows the trend observed in the $K^{0}_{S}$ mesons rather than in
> $\Lambda$ baryons, supporting baryon-meson scaling. Since
> $\phi$-mesons are made via coalescence of seemingly thermalized
> $s$ quarks in central Au+Au collisions, the observations imply hot and
> dense matter with partonic collectivity has been formed at RHIC.
>
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