[Brahms-l] Fw: Release of STAR paper on "rapidity asymmetry"

FYI


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Flemming Videbaek
Physics Department
Brookhaven National Laboratory

e-mail: videbaek@bnl.gov
phone: 631-344-4106

Subject: Release of STAR paper on "rapidity asymmetry"


> Dear Tom, Bill, Flemming, and Mark, 
> 
> I am pleased to announce STAR's intention to submit a 
> new paper on "Pseudorapidity Asymmetry and Centrality 
> Dependence of Charged Hadron Spectra in d+Au Collisions 
> at sqrt(s)=200 GeV" to PRC rapid communication one week 
> from today. The title and abstract for the paper 
> are enclosed. 
> 
>                         Sincerely, 
> 
>                          Tim 
> 
> "Pseudorapidity Asymmetry and Centrality Dependence 
> of Charged Hadron Spectra in d+Au Collisions at 
> sqrt(s)=200 GeV" 
> 
> The pseudorapidity asymmetry and centrality dependence of 
> charged hadron spectra in d+Au collisions at sqrt(sNN) = 200 GeV 
> is presented. The charged particle density at mid-rapidity, its 
> pseudorapidity asymmetry and centrality dependence are reasonably 
> reproduced by a Multi-Phase Transport model, HIJING, and the 
> latest calculations from a saturation model. Ratios of transverse 
> momentum spectra between forward and backward pseudorapidity 
> are above unity for pT below 5 GeV/c. The ratio of central to 
> peripheral spectra in d+Au collisions shows enhancement at 
> 2 < pT < 6 GeV/c, with a larger effect at backward rapidity than 
> forward rapidity.  Our measurements are in qualitative agreement 
> with gluon saturation and in contrast to expectations based on
> incoherent multiple partonic scatterings.
> 
> 

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