Measurement of single electron production up to 45 GeV/c transverse momentum at the CERN ISR

Pérez, P.; Banner, M.; Modis, Theodore; Smadja, G.; Teiger, J.; Tur, C.; Vialle, J.P.; Zaccone, H.; Zylberstejn, A.; Clark, A.; Darriulat, P.; Eggert, K.; Hungerbühler, V.; Strauss, J.; Zallo, A.; Jenni, Joel; Strolin, P.; Tarnopolsky, G.

doi:10.1016/0370-2693(82)90975-3

Cited by 11 publications

(5 citation statements)

References 16 publications

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“…The first measurements of HF decay electron spectra in Au-Au reactions at RHIC were performed by PHENIX on the data sample recorded during the first RHIC run at a CM energy of = s 130 GeV NN per nucleon pair [318]. The limited precision of the measurement prevented from drawing conclusions about possible modifications of charm production in heavy-ion collisions relative to a binary-scaled pp reference determined with the PYTHIA event generator tuned to reproduce charm production data from fixed-target experiments at the SPS and at FNAL [319] and single-electron data from the ISR [320][321][322]. The larger data sample of Au-Au collisions at = s 200 GeV NN collected in 2001 allowed the measurement of the centrality and p T dependence of the yield of electrons from HF hadron decays at midrapidity [42,323].…”

Section: Aamentioning

confidence: 99%

Open heavy flavor in QCD matter and in nuclear collisions

Prino

Rapp

2016

J. Phys. G: Nucl. Part. Phys.

185

174

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We review the experimental and theoretical status of open heavy-flavor (HF) production in high-energy nuclear collisions at RHIC and LHC. We first overview the theoretical concepts and pertinent calculations of HF transport in QCD matter, including perturbative and non-perturbative approaches in the quark-gluon plasma, effective models in hadronic matter, as well as implementations of heavy-quark (HQ) hadronization. This is followed by a brief discussion of bulk evolution models for heavy-ion collisions and initial conditions for the HQ distributions which are needed to calculate HF spectra in comparison to observables. We then turn to a discussion of experimental data that have been collected to date at RHIC and LHC, specifically for the nuclear suppression factor and elliptic flow of semileptonic HF decays, D mesons, non-prompt J/ψ from B-meson decays, and b-jets. Model comparisons to HF data are conducted with regards to extracting the magnitude, temperature and momentumdependence of HF transport coefficients from experiment.

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Section: Aamentioning

confidence: 99%

Open heavy flavor in QCD matter and in nuclear collisions

Prino

Rapp

2016

J. Phys. G: Nucl. Part. Phys.

185

174

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“…At high p T , electrons from heavy flavor meson decays start to dominate the candidate electron yield. As a baseline, there are three available p+p results from the ISR [38][39][40] that are shown in Fig. 13.…”

Section: A Heavy Flavor Electron Yieldmentioning

confidence: 99%

“…16 for 3 different centrality classes and for MB. The yield in p+p collisions is taken from the combined fit to the three ISR data sets [38][39][40]. The statistical uncertainty on R AA is taken from the statistical uncertainty on the heavy-flavor electron yield measured in Au+Au collisions shown in Fig 11. The systematic uncertainty on R AA is a quadrature sum of the systematic uncertainty on the heavy flavor electron yield in Au+Au collisions and the statistical uncertainty on the fit used to represent the denominator.…”

Section: A Heavy Flavor Electron Yieldmentioning

confidence: 99%

Heavy-quark production and elliptic flow in Au + Au collisions atsNN=62.4GeV

Adare¹,

Aidala²,

Ajitanand³

et al. 2015

Phys. Rev. C

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We present measurements of electrons and positrons from the semileptonic decays of heavyflavor hadrons at midrapidity (|y| < 0.35) in Au+Au collisions at √ s N N = 62.4 GeV. The data were collected in 2010 by the PHENIX experiment that included the new hadron-blind detector. The invariant yield of electrons from heavy-flavor decays is measured as a function of transverse momentum in the range 1 < p e T < 5 GeV/c. The invariant yield per binary collision is slightly enhanced above the p+p reference in Au+Au 0%-20%, 20%-40% and 40%-60% centralities at a comparable level. At this low beam energy this may be a result of the interplay between initial-state Cronin effects, final-state flow, and energy loss in medium. The v2 of electrons from heavy-flavor decays is nonzero when averaged between 1.3 < p e T < 2.5 GeV/c for 0%-40% centrality collisions at √ s N N = 62.4 GeV. For 20%-40% centrality collisions, the v2 at √ s N N = 62.4 GeV is smaller than that for heavy flavor decays at √ s N N = 200 GeV. The v2 of the electrons from heavy-flavor decay at the lower beam energy is also smaller than v2 for pions. Both results indicate that the heavy-quarks interact with the medium formed in these collisions, but they may not be at the same level of thermalization with the medium as observed at √ s N N = 200 GeV.

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“…The uncertainty in electron candidate v 2 is because of the RP resolution TABLE III. Summary of fit characteristics for the invariant cross section of heavy-flavor electrons in p+p collisions at √ s N N = 62.4 GeV [38][39][40], as shown in Fig. 13 .…”

Section: E Systematic Uncertaintiesmentioning

confidence: 99%

“…where N hf is the yield of heavy-flavor electrons, N photonic is the yield of photonic electrons, i.e. the data shown in As a baseline, there are three available p+p results from the ISR [38][39][40] that are shown in Fig. 13.…”

Section: A Heavy Flavor Electron Yieldmentioning

confidence: 99%

Heavy-quark production and elliptic flow in Au$+$Au collisions at $\sqrt{s_{_{NN}}}=62.4$ GeV

Adare¹,

Aidala²,

Ajitanand³

et al. 2014

Preprint

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We present measurements of electrons and positrons from the semileptonic decays of heavyflavor hadrons at midrapidity (|y| < 0.35) in Au+Au collisions at √ s N N = 62.4 GeV. The data were collected in 2010 by the PHENIX experiment that included the new hadron-blind detector.The invariant yield of electrons from heavy-flavor decays is measured as a function of transverse momentum in the range 1 < p e T < 5 GeV/c. The invariant yield per binary collision is slightly enhanced above the p+p reference in Au+Au 0%-20%, 20%-40% and 40%-60% centralities at a comparable level. At this low beam energy this may be a result of the interplay between initial-state Cronin effects, final-state flow, and energy loss in medium. The v2 of electrons from heavy-flavor decays is nonzero when averaged between 1.3 < p e T < 2.5 GeV/c for 0%-40% centrality collisions at √ s N N = 62.4 GeV. For 20%-40% centrality collisions, the v2 at √ s N N = 62.4 GeV is smaller than that for heavy flavor decays at √ s N N = 200 GeV. The v2 of the electrons from heavy-flavor decay at the lower beam energy is also smaller than v2 for pions. Both results indicate that the heavy-quarks interact with the medium formed in these collisions, but they may not be at the same level of thermalization with the medium as observed at √ s N N = 200 GeV.

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Measurement of single electron production up to 45 GeV/c transverse momentum at the CERN ISR

Cited by 11 publications

References 16 publications

Open heavy flavor in QCD matter and in nuclear collisions

Open heavy flavor in QCD matter and in nuclear collisions

Heavy-quark production and elliptic flow in Au + Au collisions atsNN=62.4GeV

Heavy-quark production and elliptic flow in Au$+$Au collisions at $\sqrt{s_{_{NN}}}=62.4$ GeV

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