[Brahms-l] Fwd: New PHENIX paper on high pT pi-zero with respect to reaction plane

FYI


Begin forwarded message:

> From: Barbara Jacak <jacak_at_skipper.physics.sunysb.edu>
> Date: March 19, 2009 11:27:40 PM EDT
> To: Nu Xu <NXu_at_lbl.gov>, Wit Busza <busza_at_mit.edu>, "Videbaek,  
> Flemming" <videbaek_at_bnl.gov>, "Vigdor, Steven" <vigdor_at_bnl.gov>
> Subject: New PHENIX paper on high pT pi-zero with respect to  
> reaction plane
>
> Dear Nu, Wit, Flemming and Steve,
>
>     I am happy to announce that in one week's time, the
> PHENIX Collaboration will submit a paper to Phys. Rev. C
> on high pT pi-zero production with respect to the reaction
> plane in 200 GeV Au+Au collisions.
>
> Please find the title and abstract below.
>
> best regards,
> Barbara
>
> --------------------------------------------------------
> Title: High-pT pi zero Production with Respect to the Reaction
> Plane in Au + Au Collisions at √sNN = 200 GeV
>
> Abstract:
> Measurements of the azimuthal anisotropy of high-pT neutral pion
> production in Au+Au collisions at √sNN = 200 GeV by the PHENIX
> experiment are presented. The data included in this paper were
> collected during the 2004 RHIC running period and represent
> approximately an order of magnitude increase in the number of
> analyzed events relative to previously published results. Azimuthal
> angle distributions of pi^0 detected in the PHENIX electromagnetic
> calorimeters are measured relative to the reaction plane determined
> event-by-event using the forward and backward beam-beam counters.
> Amplitudes of the second Fourier component (v2) of the angular
> distributions are presented as a function of pi^0 transverse momentum
> (pT) for different bins in collision centrality. Measured reaction  
> plane
> dependent pi^0 yields are used to determine the azimuthal dependence
> of the pi^0 suppression as a function of pT, RAA(
Delta phi, pT). A
> jet-quenching motivated geometric analysis is presented that attempts
> to simultaneously describe the centrality dependence and reaction  
> plane
> angle dependence of the pi^0 suppression in terms of the path lengths
> of hypothetical parent partons in the medium. This set of results  
> allows
> for a detailed examination of the influence of geometry in the  
> collision
> region, and of the interplay between collective flow and jet-quenching
> effects along the azimuthal axis.

Flemming videbaek
videbaek @ bnl.gov
Brookhaven National Lab
631-344-4106
cell: 631-681-1596



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