PAs:
X. Li, W.
Xu, P. Kurnadi, S.
Sakai, G.
Wang, J.
Dunlop, T. Ullrich, A.
Suaide and W. Xie
Target Journal:
Abstract:
We present the measurement of
non-photonic electron production at high transverse momentum in
$p$+$p$ collisions at $\sqrt{s}$= 200 GeV using data recorded during
the 2005 and 2008 runs 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
meson to electrons, we determine the integrated cross section of
electrons ($\frac{e^++e^-}{2}$) at
3GeV/c$<$\pT$<$10GeV/c from bottom and charm meson decays to
be ${d\sigma_{B\to e+B\to D \to e} \over dy_e}|_{y_e=0}$ = 6.1$\pm
0.6$(stat.)$\pm 0.8$(sys.) nb and ${d\sigma_{D\to e} \over
dy_e}|_{y_e=0}$ = 9.7$\pm 0.7$(stat.)$\pm 1.3$(sys.) nb,
respectively.
Analysis Note:
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