Measurements of $e^+e^-$ pairs from open heavy flavor in $p$+$p$ and $d$+$A$ collisions at $\sqrt{s_{NN}}=200$ GeV
Creators: name: Adare, A.
name: Afanasiev, S.
name: Aidala, C.
name: Ajitanand, N. N.
name: Akiba, Y.
name: Al-Bataineh, H.
name: Alexander, J.
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name: Roman, V. Canoa
name: Chang, B. S.
name: Chang, W. C.
name: Charvet, J. -L.
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name: Chiu, M.
name: Choi, I. J.
name: Choudhury, R. K.
name: Chujo, T.
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name: Citron, Z.
name: Cole, B. A.
name: Connors, M.
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name: Csanád, M.
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name: Dahms, T.
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name: Denisov, A.
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name: Dietzsch, O.
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name: Young, G. R.
name: Younus, I.
name: Yu, H.
name: Yushmanov, I. E.
name: Zajc, W. A.
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name: Zhang, C.
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Publisher: name: arXiv
Year: 2017
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We report a measurement of $e^+e^-$ pairs from semileptonic heavy-flavor decays in $p$+$p$ collisions at $\sqrt{s_{NN}}=200$~GeV. The $e^+e^-$ pair yield from $b\bar{b}$ and $c\bar{c}$ is separated by exploiting a double differential fit done simultaneously in dielectron invariant mass and $p_T$. We used three different event generators, {\sc pythia}, {\sc mc@nlo}, and {\sc powheg}, to simulate the $e^+e^-$ spectra from $c\bar{c}$ and $b\bar{b}$ production. The data can be well described by all three generators within the detector acceptance. However, when using the generators to extrapolate to $4π$, significant differences are observed for the total cross section. These difference are less pronounced for $b\bar{b}$ than for $c\bar{c}$. The same model dependence was observed in already published $d$+$A$ data. The $p$+$p$ data are also directly compared with $d$+$A$ data in mass and $p_T$, and within the statistical accuracy no nuclear modification is seen.
description: 510 authors, 19 pages, 16 figures, 7 tables, 2006 data. v2 is version accepted for publication by Phys. Rev. C. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html