HighpTnonphotonic electron production inp+pcollisions ats=200 

Abstract

We present the measurement of non-photonic electron production at high transverse momentum (pT > 2.5 GeV/c) in p+p collisions at √ 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 () at 3 GeV/c < pT < 10 GeV/c from bottom and charm meson decays to be 3 dσ (B→e)+(B→D→e) dye |y e=0 = 4.0±0.5(stat.)±1.1(syst.) nb and dσ D→e dye |y e =0 = 6.2±0.7(stat.)±1.5(syst.) nb, respectively.

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“…An interesting finding is that the charm hadron cross sections measured by CDF [3] and ALICE [4] at higher energies up to 7 TeV are also closer to the upper limits of FONLL calculations. Similarly, the cross section of non-photonic electrons is also consistent with the upper bound of FONLL calculations at p T (e) > 1 GeV/c [5,6]. The STAR D meson measurement covers about 70% of total p T acceptance, leading to a reasonable constraint to the total charm cross section.…”

Erratum: Transverse Momentum and Centrality Dependence of High-pTNonphotonic Electron Suppression inAu+AuCollisions atsAbelev1, Aggarwal2, Ahammed3 et al. 2011Phys. Rev. Lett.Self Cite156121621View full textAdd to dashboardCite

“…This correction is not applied to the spectra shown in Fig. 2 but will be included and discussed in detail in a recent analysis of high statistics data [4].…”

Cold-Nuclear-Matter Effects on Heavy-Quark Production at Forward and Backward Rapidity ind+AuCollisions atsNNAdare1, Aidala2, Ajitanand3 et al. 2014Phys. Rev. Lett.Self Cite635350View full textAdd to dashboardCite

“…Heavyquark production has been studied via semileptonic-decay electrons and muons, as well as fully reconstructed D mesons, at the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider [1,2]. In p þ p collisions, heavy-quark production tests perturbative quantum chromodynamics and provides a baseline for the results from heavy-ion collisions [3][4][5]. In central Au þ Au collisions at ffiffiffiffiffiffiffi ffi s NN p ¼ 200 GeV, strong suppression of high-transverse-momentum (p T ) electrons from semileptonic decay of open heavy-flavor hadrons has been observed at midrapidity [6,7].…”