[Brahms-l] Fwd: STAR new paper on pi0, eta, and direct photon production in p+p and d+Au collisions

FYI



> From: Nu Xu <NXu_at_lbl.gov>
> Date: December 12, 2009 6:42:11 PM EST
> To: Barbara Jacak <jacak_at_skipper.physics.sunysb.edu>, Wit Busza <busza_at_MIT.EDU 
> >, Steven Vigdor <vigdor_at_bnl.gov>, Flemming Videbaek  
> <videbaek_at_bnl.gov>
> Cc: Nu Xu <NXu_at_lbl.gov>
> Subject: STAR new paper on pi0, eta, and direct photon production in  
> p+p and d+Au collisions
>
> 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 high pT  
> neutral pion, eta, and direct photon production in p+p and d+Au  
> collisions at RHIC. The title and abstract are included below.
>
> Best regards,
>
> Nu Xu
>
> -----------------------------------------------------------------------
> Nu Xu
>
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> -----------------------------------------------------------------------
>
> Title:  "Inclusive pi0, eta meson, and direct photon production at  
> high transverse momentum in $p$+$p$ and $d$+Au collisions at $ 
> \sqrt{s_{NN}}$ = 200 GeV "
>
> Abstract:  "We report a measurement of high-pT inclusive $\pi^{0}$, $ 
> \eta$, and direct photon production in $p$+$p$ and $d$+Au collisions  
> at $\sqrt{s_{NN}}$ = 200 GeV at midrapidity (0 < $\eta$ < 1).  
> Photons from the decay $\pi^{0}$ $\rightarrow$ $\gamma \gamma$ were  
> detected in the Barrel Electromagnetic Calorimeter of the STAR  
> experiment at RHIC. The $\eta$ $\rightarrow$ $\gamma \gamma$ decay  
> was also observed and constituted the first $\eta$ measurement by  
> STAR. The first direct photon cross section measurement by STAR are  
> also presented, the signal was extracted statistically by  
> subtracting $\pi^{0}$, $\eta$, $\omega$(782) decay background from  
> the inclusive photon distribution observed in the calorimeter. The  
> analysis is described in detail, and the results are found to be in  
> good agreement with earlier measurements and with next-to-leading  
> order perturbative QCD calculations."



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