[Brahms-l] Fw: New PHENIX paper

FYI

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

e-mail: videbaek@bnl.gov
phone: 631-344-4106
----- Original Message ----- 
From: "W.A. Zajc" <zajc@nevis.columbia.edu>
To: "Thomas Kirk" <tkirk@bnl.gov>; "Wit Busza" <busza@mit.edu>; "'Timothy
Hallman'" <hallman@bnl.gov>; "'flemming videbaek'" <videbaek@bnl.gov>
Sent: Friday, October 01, 2004 2:12 PM
Subject: New PHENIX paper


> Dear Tom, Wit, Tim and Flemming:
>
> In one week's time, the PHENIX Collaboration will submit a paper on phi
production in 200 GeV Au+Au collisions to Physical Review C. The title and
abstract are given below.
>
> Best regards,
>
> Bill
>
>
============================================================================
===================
>
>
> Title: Production of Phi mesons at mid-rapidity in √sNN = 200 GeV Au+Au
collisions at RHIC
>
> Abstract: We present the results of phi meson production in the K+K− decay
channel from Au+Au collisions at √sNN = 200 GeV as measured at mid-rapidity
by the PHENIX detector at RHIC. Precision
> resonance centroid and width values are extracted as a function of
collision centrality. No significant variation from the PDG accepted values
is observed, contrary to some model predictions. The transverse mass spectra
are fitted with a linear exponential function for which the derived inverse
slope parameter is seen to be constant as a function of centrality. These
data are also fitted by a hydrodynamic model with the result that the
freeze–out temperature and the expansion velocity values are consistent with
the values previously derived from fitting identified charged hadron data.
As a function of transverse momentum the collisions scaled
peripheral–to–central yield ratio RCP for the phi is comparable to that of
pions rather than that of protons. This result lends support to theoretical
models which distinguish between baryons and mesons instead of particle mass
for explaining the anomalous (antiproton yield.
>
>


_______________________________________________
Brahms-l mailing list
Brahms-l@lists.bnl.gov
http://lists.bnl.gov/mailman/listinfo/brahms-l