[Brahms-l] Fwd: New PHENIX paper on bottom and charm via e-h correlations in p+p

FYI
I guess there will be more from Phenix since their policy is to have  
new results submitted before QM


Flemming




Begin forwarded message:

> From: Barbara Jacak <jacak_at_skipper.physics.sunysb.edu>
> Date: March 21, 2009 10:46:01 AM EDT
> To: Nu Xu <NXu_at_lbl.gov>, Wit Busza <busza_at_mit.edu>, "Videbaek,  
> Flemming" <videbaek_at_bnl.gov>, "Vigdor, Steven" <vigdor_at_bnl.gov>
> Subject: New PHENIX paper on bottom and charm via e-h correlations  
> in p+p
>
> Dear Nu, Wit, Flemming and Steve,
>
>    I am happy to announce that in one week's time, the
> PHENIX Collaboration will submit a paper to Phys. Rev. Lett.
> on bottom vs. charm via electron-hadron correlations in
> p+p collisions.
>
> Please find the title and abstract below.
>
> best regards,
> Barbara
>
> --
> Title:
> Measurement of Bottom versus Charm as a Function of Transverse  
> Momentum
> with Electron-Hadron Correlations in p + p Collisions at sqrt(s) =  
> 200 GeV.
>
> Abstract:
> The momentum distribution of electrons from semi-leptonic decays of  
> charm and
> bottom for mid-rapidity |y| < 0.35 in p + p collisions at ps = 200 GeV
> is measured
> by the PHENIX experiment at the Relativistic Heavy Ion Collider over
> the transverse
> momentum range 2 < pT < 7 GeV/c. The ratio of the yield of electrons
> from bottom
> to that from charm is presented. The ratio is determined using partial
> D/D-bar ->
> e±K∓X (K unidentified) reconstruction. It is found that the yield  
> of
> electrons from
> bottom becomes significant above 4 GeV/c in pT. A
> fixed-order-plus-next-to-leading-
> log (FONLL) perturbative QCD calculation agrees with the data within
> the theoretical
> and experimental uncertainties. The extracted total bottom production
> cross section
> at this energy is \sigma_(bb-bar) = 3.2 +1.2−1.1(stat)  
> +1.4−1.3(sys)μb.

Flemming videbaek
videbaek @ bnl.gov
Brookhaven National Lab
631-344-4106
cell: 631-681-1596



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