[Brahms-l] Fwd: STAR new paper on high pT NPE in p+p collisions at RHIC

Flemming Videbaek
videbaek @ bnl.gov
Brookhaven National Lab
Physics Department
Bldg 510D
Upton, NY 11973

phone: 631-344-4106
cell     :  631-681-1596





Begin forwarded message:

> From: Nu Xu <nxu_at_lbl.gov>
> Date: February 7, 2011 1:06:53 PM EST
> To: Barbara Jacak <Barbara.Jacak_at_stonybrook.edu>, Flemming Videbaek <videbaek_at_bnl.gov>, Wit Busza <busza_at_MIT.EDU>, Steven Vigdor <vigdor_at_bnl.gov>
> Cc: Nu Xu <NXu_at_lbl.gov>
> Subject: STAR new paper on high pT NPE in p+p collisions at RHIC
> 
> Dear Barbara, Wit, Flemming and Steve,
> 
> I am pleased to announce that the STAR collaboration will submit to Physical Review D,  in one week's time,  a new paper on on high pT NPE in p+p collisions at RHIC. These results are from RHIC Run5 and Run8. The title and abstract are included below.
> 
> Best regards,
> 
> Nu Xu
> 
> -------------------------------------------------------------------------
>  Nu Xu
> 
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> 
> Title: "High $p_{T}$ non-photonic electron production in $p$+$p$ collisions at $\sqrt{s}$ = 200 GeV"
> 
> Abstract:  "We present the measurement of non-photonic electron production at high transverse momentum ($p_T > $ 2.5 GeV/$c$) in $p$+$p$ collisions at $\sqrt{s}$ = 200 GeV using data recorded during 2005 and 2008 by the STAR experiment at the Relativistic Heavy Ion Collider (RHIC).  The measured cross-sections from the two runs are consistent with each other despite a large difference in photonic background levels due to different detector configurations. We compare the measured non-photonic electron cross-sections with previously published RHIC data and pQCD calculations.  Using the relative contributions of B and D mesons to non-photonic electrons, we determine the integrated cross sections of electrons  ($\frac{e^++e^-}{2}$) at 3 GeV/$c < p_T <~$10 GeV/$c$ from bottom and charm meson decays to be ${d\sigma_{(B\to e)+(B\to D \to e)} \over dy_e}|_{y_e=0}$ = 4.0$\pm0.5$({\rm stat.})$\pm1.1$({\rm syst.}) nb and ${d\sigma_{D\to e} \over dy_e}|_{y_e=0}$ = 6.2$\pm0.7$({\rm stat.})$\pm1.5$({\rm syst.}) nb, respectively."
> 



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