[Brahms-l] Fwd: New PHOBOS paper on Non-flow correlations and elliptic flow fluctuations in Au+Au collisions

FYI




> From: Wit Busza <busza_at_mit.edu>
> Date: January 26, 2010 1:43:22 PM EST
> To: Steven Vigdor <vigdor_at_bnl.gov>, Barbara Jacak <jacak_at_skipper.physics.sunysb.edu 
> >, Nu Xu <nxu_at_lbl.gov>, videbaek flemming <videbaek_at_bnl.gov>
> Cc: PHOBOS Collaboration <phobos_at_mit.edu>
> Subject: New PHOBOS paper on Non-flow correlations and elliptic flow  
> fluctuations in Au+Au collisions
>
> Dear Barbara, Flemming, Nu and Steve,
>
> I am pleased to announce that PHOBOS will submit to PRC, in a week's  
> time, a paper whose title and abstract are given below.
> All the best,
> Wit
>
> Title: Non-flow correlations and elliptic flow fluctuations in Au+Au  
> collisions at sqrt(s_NN)=200GeV
>
> Abstract:
> This paper presents results on event-by-event elliptic flow
> fluctuations in Au+Au collisions at $\snn =$
> 200~GeV, where the contribution from non-flow correlations has been
> subtracted.  An analysis method is introduced to measure non-flow
> correlations, relying on the assumption that non-flow correlations
> are most prominent at short ranges ($\detalt$). Assuming that
> non-flow correlations are of the order that is observed in p+p
> collisions for long range correlations ($\detagt$), relative
> elliptic flow fluctuations of approximately 30-40\% are observed.
> These results are consistent with predictions based on spatial
> fluctuations of the participating nucleons in the initial nuclear
> overlap region. It is found that the long range non-flow
> correlations in Au+Au collisions would have to be more than an order  
> of
> magnitude stronger compared to the p+p data to lead to the observed
> azimuthal anisotropy fluctuations with no intrinsic elliptic flow
> fluctuations.
>
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> Wit Busza
> Francis Friedman Professor of Physics
> 24-510
> Massachusetts Institute of Technology
> 77 Massachusetts Avenue
> Cambridge, MA 02139
> Phone 617 253 7586
> Fax 617 253 1755   busza_at_mit.edu
>

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