Measurements of e+e- pairs from open heavy flavor in p+p and d+A collisions at s NN =200 GeV

PHENIX Collaboration

Research output: Contribution to journalArticle

Abstract

We report a measurement of e+e- pairs from semileptonic heavy-flavor decays in p+p collisions at sNN=200 GeV. The e+e- pair yield from bb and cc is separated by exploiting a double differential fit done simultaneously in dielectron invariant mass and pT. We used three different event generators, pythia, mc@nlo, and powheg, to simulate the e+e- spectra from cc and bb 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 bb than for cc. 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 pT, and within the statistical accuracy no nuclear modification is seen.

Original languageEnglish (US)
Article number024907
JournalPhysical Review C
Volume96
Issue number2
DOIs
StatePublished - Aug 18 2017

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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