[Brahms-l] Fw: New STAR paper on Forward Neutral Pion Production

FYI
- this paper presumably have the famous d-A correlations that vanished over a vere small change in pt on the
trigger pi0.


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

phone: 631-344-4106
fax:        631-344-1334
e-mail: videbaek @ bnl.gov
----- Original Message ----- 
From: "Timothy Hallman" <hallman@bnl.gov>
To: <Aronsons@bnl.gov>; "William A Zajc" <zajc@bnl.gov>; "'Wit Busza'" <busza@MIT.EDU>; "Videbaek, Flemming" <videbaek@bnl.gov>
Cc: "Hallman" <hallman@bnl.gov>
Sent: Sunday, January 29, 2006 10:07 PM
Subject: New STAR paper on Forward Neutral Pion Production


> Dear Sam, Bill, Flemming, and Wit:
> 
> It is my pleasure to announce STAR's intention to submit the
> following paper to Physical Review Letters in one week's time:
> 
> "Forward Neutral Pion Production in p+p and d+Au Collisions at
> sqrt(s_NN)=200 GeV."
> 
> The abstract is enclosed.
> 
>                            Sincerely,
> 
>                            Tim Hallman
> 
> 
> 
> Abstract:
> Measurements of the production of forward pi0 mesons from p+p and d+Au
> collisions at sqrt(s_NN)=200 GeV are reported. The p+p yield generally
> agrees with next-to-leading order perturbative QCD calculations. The d+Au
> yield per binary collision is suppressed as eta increases, decreasing to
> ~30% of the p+p yield at <eta>=4.00, well below shadowing expectations.
> Exploratory measurements of azimuthal correlations of the forward pi0 with
> charged hadrons at eta~0 show a recoil peak in p+p that is suppressed in
> d+Au at low pion energy. These observations are qualitatively consistent
> with a saturation picture of the low-x gluon structure of heavy nuclei.
> 
> 
>
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