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

PHENIX Collaboration

doi:10.1103/PhysRevC.96.024907

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 journal › Article › peer-review

16 Scopus citations

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 language	English
Article number	024907
Journal	Physical Review C
Volume	96
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevC.96.024907
State	Published - 18 Aug 2017
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevC.96.024907

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@article{a6c694e6356946db9d883f874d2a30d5,

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

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.",

author = "{PHENIX Collaboration} and A. Adare and S. Afanasiev and C. Aidala and Ajitanand, {N. N.} and Y. Akiba and H. Al-Bataineh and J. Alexander and M. Alfred and K. Aoki and N. Apadula and L. Aphecetche and J. Asai and Atomssa, {E. T.} and R. Averbeck and Awes, {T. C.} and C. Ayuso and B. Azmoun and V. Babintsev and A. Bagoly and M. Bai and G. Baksay and L. Baksay and A. Baldisseri and Barish, {K. N.} and Barnes, {P. D.} and B. Bassalleck and Basye, {A. T.} and S. Bathe and S. Batsouli and V. Baublis and C. Baumann and A. Bazilevsky and S. Belikov and R. Belmont and R. Bennett and A. Berdnikov and Y. Berdnikov and Bickley, {A. A.} and Blau, {D. S.} and M. Boer and Boissevain, {J. G.} and Bok, {J. S.} and H. Borel and K. Boyle and Brooks, {M. L.} and J. Bryslawskyj and H. Buesching and V. Bumazhnov and G. Bunce and Z. Citron",

note = "Publisher Copyright: {\textcopyright} 2017 American Physical Society.",

year = "2017",

month = aug,

day = "18",

doi = "10.1103/PhysRevC.96.024907",

language = "English",

volume = "96",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "2",

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TY - JOUR

T1 - Measurements of e+e- pairs from open heavy flavor in p+p and d+A collisions at s NN =200 GeV

AU - PHENIX Collaboration

AU - Adare, A.

AU - Afanasiev, S.

AU - Aidala, C.

AU - Ajitanand, N. N.

AU - Akiba, Y.

AU - Al-Bataineh, H.

AU - Alexander, J.

AU - Alfred, M.

AU - Aoki, K.

AU - Apadula, N.

AU - Aphecetche, L.

AU - Asai, J.

AU - Atomssa, E. T.

AU - Averbeck, R.

AU - Awes, T. C.

AU - Ayuso, C.

AU - Azmoun, B.

AU - Babintsev, V.

AU - Bagoly, A.

AU - Bai, M.

AU - Baksay, G.

AU - Baksay, L.

AU - Baldisseri, A.

AU - Barish, K. N.

AU - Barnes, P. D.

AU - Bassalleck, B.

AU - Basye, A. T.

AU - Bathe, S.

AU - Batsouli, S.

AU - Baublis, V.

AU - Baumann, C.

AU - Bazilevsky, A.

AU - Belikov, S.

AU - Belmont, R.

AU - Bennett, R.

AU - Berdnikov, A.

AU - Berdnikov, Y.

AU - Bickley, A. A.

AU - Blau, D. S.

AU - Boer, M.

AU - Boissevain, J. G.

AU - Bok, J. S.

AU - Borel, H.

AU - Boyle, K.

AU - Brooks, M. L.

AU - Bryslawskyj, J.

AU - Buesching, H.

AU - Bumazhnov, V.

AU - Bunce, G.

AU - Citron, Z.

PY - 2017/8/18

Y1 - 2017/8/18

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85028775869&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.96.024907

DO - 10.1103/PhysRevC.96.024907

M3 - Article

AN - SCOPUS:85028775869

SN - 2469-9985

VL - 96

JO - Physical Review C

JF - Physical Review C

IS - 2

M1 - 024907

ER -

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

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