[Brahms-l] Fw: New PHENIX Paper on Direct Photon Production in p+p Collisions

FYI

Sent: Sunday, September 10, 2006 9:34 PM
Subject: New PHENIX Paper on Direct Photon Production in p+p Collisions


> Dear Wit, Tim, Flemming and Peter:
> 
> In one week's time PHENIX intends to submit a new result on direct photon
> production in p+p collisions to Physical Review Letters. Please find the
> title and abstract enclosed below.
> 
> Best regards,
> 
> Bill
> 
> ============================================================================
> =======
> 
> Title: Measurement of direct photon production in p + p collisions at vs =
> 200 GeV
> 
> 
> ABSTRACT:
> 
> Cross sections for mid-rapidity production of direct photons in p+p
> collisions at RHIC are reported
> for 3<pT <16 GeV/c. Next-to-leading order (NLO) perturbative QCD (pQCD)
> describes the data
> well for pT > 5 GeV/c where the uncertainties of the measurement and theory
> are comparable.
> We also report on the effect of requiring the photons to be isolated from
> parton jet energy. The
> observed fraction of isolated photons is well described by pQCD for pT >7
> GeV/c.
>
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