[Brahms-l] Fw: New PHENIX paper on dielectron enhancement in Au+Au collisions

FYI
\Sent: Thursday, June 14, 2007 6:23 PM
Subject: New PHENIX paper on dielectron enhancement in Au+Au collisions


> Dear Tim, Wit, Flemming and Peter,
> 
> I am happy to announce that in one week's time the PHENIX Collaboration
> will submit a paper to Phys. Rev. Letters on dielectron enhancement in
> Au+Au collisions .Please find the title and abstract below.
> 
> Best regards,
> Barbara
> 
> ----------------------------------------------------------------------------
> 
> TITLE:
> Enhancement of the dielectron continuum in sqrt{s_NN} = 200 GeV
> Au+Au collisions
> 
> ABSTRACT:
> PHENIX has measured the dielectron continuum in sqrt{s_NN} =
> 200 GeV Au+Au collisions. In minimum bias collisions the dielectron
> yield in the mass range between 150 and 750 MeV/c^2 is enhanced
> by a factor of 3.4 +/- 0.2(stat.) +/- 1.3(syst.) +/- 0.7(model) compared
> to the expectation from our model of hadron decays. The integrated
> yield increases faster with the centrality of the collisions than the
> number of participating nucleons, suggesting emission from scattering
> processes in the dense medium. The continuum yield between the
> masses of the phi and the J/psi meson is consistent with expectations
> from correlated c-cbar production, though other mechanisms are not
> ruled out.
>
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