[Brahms-l] Fw: STAR Paper on Identified Hadron Spectra in Au+Au

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


Subject: STAR Paper on Identified Hadron Spectra in Au+Au


> Dear Sam, Bill, Flemming, and Wit:
> 
> It is my pleasure to announce STAR's intention to submit the
> following paper to Physical Review C in one week's time.
> 
> Measurements of identified particles at intermediate 
> transverse momentum in the STAR experiment from Au+Au collisions at 
> sqrt{s_{NN}}=200 GeV
> 
> The abstract is enclosed.
> 
>                              Sincerely,
> 
>                              Tim Hallman
> 
> Abstract :
> 
> Abstract: Data for Au+Au collisions at sqrt{s_{NN}}=200 GeV are 
> analyzed to determine the ratios of identified hadrons (pi, K, p, 
> Lambda) as  functions of collision centrality and transverse momentum 
> (p_T).  We find that ratios of anti-baryon to baryon yields are 
> independent of p_T up to 5 GeV/c, a result inconsistent with results 
> of theoretical pQCD calculations that predict a decrease due to a 
> stronger contribution from valence quark scattering.  For both 
> strange and non-strange species, strong baryon enhancements relative 
> to meson yields are observed as a function of collision centrality in 
> the intermediate p_T region, leading to p/pi and Lambda/K ratios 
> greater than unity.  The increased p_T range offered by the Lambda/K^
> {0}_{S} ratio allows a test of the  applicability of various models 
> developed for the  intermediate p_T region.  The physics implications 
> of these measurements are discussed with regard to different 
> theoretical models.
> 
>
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