[Brahms-l] Fwd: STAR new paper on Azimuthal di-hadron correlations in d+Au and Au+Au collisions at RHIC

FYI






Begin forwarded message:

> From: Nu Xu <NXu_at_lbl.gov>
> Date: April 2, 2010 12:10:48 PM EDT
> To: Barbara Jacak <jacak_at_skipper.physics.sunysb.edu>, Flemming  
> Videbaek <videbaek_at_bnl.gov>, Wit Busza <busza_at_MIT.EDU>, Steven  
> Vigdor <vigdor_at_bnl.gov>
> Cc: Nu Xu <NXu_at_lbl.gov>
> Subject: STAR new paper on Azimuthal di-hadron correlations in d+Au  
> and Au+Au collisions at RHIC
>
> Dear Barbara, Wit, Flemming and Steve,
>
> I am pleased to announce that the STAR collaboration will submit to  
> Physical Review C,  in one week's time,  a new paper on Azimuthal di- 
> hadron correlations in d+Au and Au+Au collisions at RHIC. The title  
> and abstract are included below.
>
> Best regards,
>
> Nu Xu
>
> -----------------------------------------------------------------------
> Nu Xu
>
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> -----------------------------------------------------------------------
>
> Title: "Azimuthal di-hadron correlations in Au+Au collisions at $ 
> \sqrt{s_{NN}}$ = 200 GeV from STAR"
>
> Abstract: "Yields, correlation shapes, and mean transverse momenta  
> pT of charged particles associated with intermediate to high-pT  
> trigger particles (2.5 < pT < 10 GeV/c) in d+Au and Au+Au collisions  
> at $\sqrt{s_{NN}}$ = 200 GeV are presented. For associated particles  
> at higher pT > 2.5 GeV/c, narrow correlation peaks are seen in d+Au  
> and Au+Au, indicating that the main production mechanism is jet  
> fragmentation. At lower associated particle pT < 2 GeV/c, a large  
> enhancement of the near-($\Delta \phi$ ~ 0) and away-side ($\Delta  
> \phi$ ~ $\pi$) associated yields is found, together with a strong  
> broadening of the away-side yields in Au+Au collisions compared to d 
> +Au measurements, suggesting that other particle production  
> mechanisms play a role. This is further supported by the observed  
> significant softening of the away-side associated particle yield  
> distribution at $\Delta \phi$ ~ $\pi$ in central Au+Au collisions."



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