[Brahms-l] Fw: New PHENIX Manuscript on direct photon production in p+p collisions

FYI
----------------------------------------------------------------
Flemming Videbaek
Physics Department
Brookhaven National Laboratory

e-mail: videbaek@bnl.gov
phone: 631-344-4106
----- Original Message ----- 
From: "W.A. Zajc" <zajc@nevis.columbia.edu>
To: "Thomas Kirk" <tkirk@bnl.gov>; "'Busza, Wit'" <busza@mit.edu>;
<Hallman@bnl.gov>; "Flemming Videbaek" <videbaek@bnl.gov>
Sent: Tuesday, January 25, 2005 7:23 PM
Subject: New PHENIX Manuscript on direct photon production in p+p collisions


> Dear Tom, Wit, Tim and Flemming:
>
> The PHENIX Collaboration intends to submit in one week's time a manuscript
> on direct photon production in (Run-2) p+p collisions to Rapid
> Communications in Physical Review D. The title and abstract are included
> below.
>
> Best regards,
>
> Bill
>
>
============================================================================
> ==================
>
> Title: Mid-Rapidity Direct-Photon Production in p+p Collisions at
> $\sqrt{s}=200$~GeV
>
> Abstract:  A measurement of direct photons in p+p collisions at
> $\sqrt{s}=200$~GeV is presented. A photon excess above background from
> $\pi^0 \rightarrow \gamma+\gamma$, $\eta\rightarrow \gamma+\gamma$ and
other
> decays is observed in the transverse momentum range $5.5 <p_\mathrm{T} <
> 7$~GeV/$c$. The result is compared to a next-to-leading-order perturbative
> QCD calculation.  Within errors, good agreement is found between the QCD
> calculation and the measured result.
>


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