[Brahms-l] Fw: New PHENIX paper on p and pbar correlations at high pT

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




> Dear Wit, Tim, Flemming and Peter:
> 
> In one week's time the PHENIX Collaboration will submit a new paper to
> Physics Letters B on proton and anti-proton correlations in Au+Au collisions
> at RHIC. The title and abstract are below.
> 
> Best regards,
> 
> Bill
> 
> ----------------------------------------------------------------------------
> ------------------
> 
> TITLE: Correlated Production of p and pbar's in Au+Au Collisions at
> \sqrt{s_{NN}} = 200 GeV
> 
> ABSTRACT:
> 
> Correlations between p and pbar's at transverse momenta typical of enhanced
> baryon production in Au+Au collisions are reported. The PHENIX experiment
> measures same and opposite sign baryon pairs in Au+Au collisions at
> \sqrt{s_{NN}} = 200 GeV. Correlated production of p and pbar's with the
> trigger particle from the range 2.5 < pT < 4.0 GeV/c and the associated
> particle with 1.8 < pT < 2.5 GeV/c is observed to be nearly independent of
> the centrality of the collisions. Same sign pairs show no correlation at any
> centrality. The conditional yield of mesons triggered by baryons (and
> anti-baryons) and mesons in the same pT range rises with increasing
> centrality, except for the most central collisions, where baryons show a
> significantly smaller number of associated mesons. These data are consistent
> with a picture in which hard scattered partons produce correlated p and
> pbar's in the pT region of the baryon excess.
>
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