[Brahms-l] Fw: New STAR Paper on Open Charm Yields in d+Au Collisions

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

e-mail: videbaek@bnl.gov
phone: 631-344-4106
----- Original Message ----- 
From: "Timothy Hallman" <hallman@bnl.gov>
To: <tkirk@bnl.gov>; <zajc@nevis.columbia.edu>; "Videbaek, Flemming"
<videbaek@bnl.gov>; "Baker, Mark" <mdbaker@bnl.gov>
Cc: <hallman@bnl.gov>
Sent: Thursday, June 24, 2004 12:21 AM
Subject: New STAR Paper on Open Charm Yields in d+Au Collisions


> Dear Tom, Bill, Flemming, and Mark,
>
> I am pleased to announce STAR's intention to submit a new
> paper on "Open charm yields in d+Au collisions at roots_NN
> = 200 GeV" to Physical Review Letters one week
> from today. The title and abstract for the paper are
> enclosed.
>
>                 Sincerely,
>
>                  Tim
>
>
>
>
>
> Title:     "Open charm yields in d+Au collisions at roots_NN
>             = 200 GeV"
>
> Abstract:   Open charm spectra at mid-rapidity from direct
>              reconstruction of Dzero(Dzerobar) -->
>              K -/+ pi ± in d+Au collisions and indirect electron/
>              positron measurements via charm semileptonic decays in
>              p+p and d+Au collisions at roots_NN = 200 GeV are
>              reported. The Dzero (Dzerobar) spectrum covers a
>              transverse momentum (pt) range of 0.1 < pt < 3 GeV/c
>              whereas the electron spectra cover a range of
>              1 < pt < 4 GeV/c. The electron spectra show approximately
>              binary collision scaling between p+p and d+Au
>              collisions. From these two independent analyses,
>              the differential cross section per nucleon-nucleon
>              interaction at mid-rapdity for open charm production
>              from d+Au collisions at RHIC is
>              dsigma_supNN_subccbar/dy = 0.30 ± 0.04 (stat) ±
>              0.09 (syst) mb. Next-to-leading-order pQCD calculations
>              underpredict the charm yield. Consequences for A+A
>              collisions at RHIC from this large yield are discussed.
>


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