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

Adare, A ; Afanasiev, S ; Aidala, C. ; Ajitanand, N. N. ; Akiba, Y. ; Al-Bataineh, H ; Gustafsson, Hans-Åke LU ; Haslum, Eva LU ; Oskarsson, Anders LU and Rosendahl, Sarah LU , et al. (2017) In Physical Review C 96(2).
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... (More)
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. © 2017 American Physical Society. (Less)
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author collaboration
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review C
volume
96
issue
2
article number
024907
publisher
American Physical Society
external identifiers
  • scopus:85028775869
ISSN
2469-9985
DOI
10.1103/PhysRevC.96.024907
language
English
LU publication?
yes
additional info
Cited By :1 Export Date: 18 January 2018
id
9f72a8c2-3226-4586-80e3-869f66f3af7d
date added to LUP
2018-01-18 09:46:58
date last changed
2023-04-08 06:00:50
@article{9f72a8c2-3226-4586-80e3-869f66f3af7d,
  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. © 2017 American Physical Society.}},
  author       = {{Adare, A and Afanasiev, S and Aidala, C. and Ajitanand, N. N. and Akiba, Y. and Al-Bataineh, H and Gustafsson, Hans-Åke and Haslum, Eva and Oskarsson, Anders and Rosendahl, Sarah and Silvermyr, David and Stenlund, Evert}},
  issn         = {{2469-9985}},
  language     = {{eng}},
  number       = {{2}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review C}},
  title        = {{Measurements of e+e- pairs from open heavy flavor in p+p and d+A collisions at s NN =200 GeV}},
  url          = {{http://dx.doi.org/10.1103/PhysRevC.96.024907}},
  doi          = {{10.1103/PhysRevC.96.024907}},
  volume       = {{96}},
  year         = {{2017}},
}