[Brahms-l] Fw: new Phobos paper

FYI



Sent: Tuesday, September 19, 2006 4:34 PM
Subject: new Phobos paper


> Dear Peter, Bill, Flemming, and Tim:
> 
> It is my pleasure to announce that in one week's time Phobos intends  
> to submit the
> following paper to Phys. Rev. C .
> 
> All the best,
> Wit
> 
> 
> 
> 
> 
> Title:
> Identified hadron transverse momentum spectra in Au+Au collisions at  
> sqrt(s_NN)=62.4 GeV
> 
> Abstract:
> Transverse momentum spectra of pions, kaons, protons and antiprotons  
> from Au+Au collisions at
> sqrt(s_NN)=62.4 GeV have been measured by the PHOBOS experiment at  
> the Relativistic Heavy Ion
> Collider at Brookhaven National Laboratory. The identification of  
> particles relies on three different
> methods: low momentum particles stopping in the first detector  
> layers; the specific energy loss
> (dE/dx) in the silicon Spectrometer, and Time-of-Flight measurement.  
> These methods cover the
> transverse momentum ranges 0.03-0.2, 0.2-1.0 and 0.5-3.0 GeV/c,  
> respectively. Baryons are found
> to have substantially harder transverse momentum spectra than mesons.  
> The pT region in which
> the proton to pion ratio reaches unity in central Au+Au collisions at  
> sqrt(s_NN)=62.4 GeV fits into
> a smooth trend as a function of collision energy. At low transverse  
> momenta, the spectra exhibit
> a significant deviation from transverse mass scaling, and when the  
> observed particle yields at very
> low pT are compared to extrapolations from higher pT, no significant  
> excess is found. By comparing
> our results to Au+Au collisions at sqrt(s_NN)=200 GeV, we conclude  
> that the net proton yield at
> midrapidity is proportional to the number of participant nucleons in  
> the collision.
>
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