[Brahms-l] Fw: new paper from Phobos

FYI

Sent: Tuesday, November 29, 2005 12:24 PM
Subject: new paper from Phobos


> Dar Sam,
> The Phobos Collaboration is ready to submit for publication a paper 
> on our measurements of spectra in Au+Au and Cu+Cu collisions at 
> sqrt(s_NN) = 62.4 and 200 GeV.
> The title and abstract are given below. We plan to submit the paper 
> to PRL on Dec. 7.
> All the best,
> Wit
> 
> 
> 
> Title:
> System size and centrality dependence of charged hadron transverse momentum
> spectra in Au+Au and Cu+Cu collisions at sqrt(s_NN) = 62.4 and 200 GeV
> 
> Abstract:
> We present transverse momentum distributions of charged hadrons 
> produced in Cu+Cu collisions at sqrt(s_NN) = 62.4 and 200 GeV.  The
> spectra are measured for transverse momenta 0.25 < p_T < 5.0 GeV/c 
> and 0.25 < p_T < 7.0 GeV/c, respectively, in a pseudo-rapidity range 
> of 0.2 < eta < 1.4.  The nuclear modification factor R_AA is 
> calculated relative to p+p data at both collision energies as a 
> function of collision centrality. At a given collision energy and 
> fractional cross-section, R_AA is observed to be systematically 
> larger in Cu+Cu collisions compared to Au+Au. However, for the same 
> number of participating nucleons, R_AA is essentially the same in 
> both systems over the measured range of p_T, in spite of the 
> significantly different geometries of the Cu+Cu and Au+Au systems.
>
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