Measurement of high- single electrons from heavy-flavor decays in collisions at 200 GeV
Sep, 2006Citations per year
Abstract:
The momentum distribution of electrons from decays of heavy flavor (charm and beauty) for midrapidity |y| < 0.35 in p+p collisions at sqrt(s) = 200 GeV has been measured by the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) over the transverse momentum range 0.3 < p_T < 9 GeV/c. Two independent methods have been used to determine the heavy flavor yields, and the results are in good agreement with each other. A fixed-order-plus-next-to-leading-log pQCD calculation agrees with the data within the theoretical and experimental uncertainties, with the data/theory ratio of 1.72 +/- 0.02^stat +/- 0.19^sys for 0.3 < p_T < 9 GeV/c. The total charm production cross section at this energy has also been deduced to be sigma_(c c^bar) = 567 +/- 57^stat +/- 224^sys micro barns.- 13.20.He
- 25.75.Dw
- 13.85.Qk
- 13.20.Fc
- p p: colliding beams
- charm
- bottom
- quark: pair production
- quark: semileptonic decay
- electron: momentum spectrum
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