Dilepton mass spectra in p+p collisions at sqrt(s)= 200 GeV and the contribution from open charm

Abstract

The PHENIX experiement has measured the electron-positron pair mass spectrum from 0 to 8 GeV/c^2 in p+p collisions at sqrt(s)=200 GeV. The contributions from light meson decays to e^+e^- pairs have been determined based on measurements of hadron production cross sections by PHENIX. They account for nearly all e^+e^- pairs in the mass region below 1 GeV/c^2. The e^+e^- pair yield remaining after subtracting these contributions is dominated by semileptonic decays of charmed hadrons correlated through flavor conservation. Using the spectral shape predicted by PYTHIA, we estimate the charm production cross section to be 544 +/- 39(stat) +/- 142(syst) +/- 200(model) μb, which is consistent with QCD calculations and measurements of single leptons by PHENIX.

arXiv comment375 authors from 57 institutions, 18 pages, 4 figures, 2 tables. Submitted to Physics Letters B. v2 fixes technical errors in matching authors to institutions. 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

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Cited by in corpus (59)

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• Heavy Quark Production in p+p and Energy Loss and Flow of Heavy Quarks in Au+Au Collisions at sqrt(s_NN)=200 GeV
• Hadron properties in the nuclear medium
• Hadrons in strongly interacting matter
• From Kadanoff-Baym dynamics to off-shell parton transport
• Open Heavy Flavor in QCD Matter and in Nuclear Collisions
• Photoproduction of J/psi and of high mass e+e- in ultra-peripheral Au+Au collisions at sqrt(s_NN) = 200 GeV
• Ground and excited charmonium state production in p+p collisions at sqrt(s)=200 GeV
• Measurement of Bottom versus Charm as a Function of Transverse Momentum with Electron-Hadron Correlations in p+p Collisions at sqrt(s)=200 GeV
• Transverse momentum dependence of J/psi polarization at midrapidity in p+p collisions at sqrt(s)=200 GeV
• Analysis of dilepton production in Au+Au collisions at sqrt(s_NN)=200 GeV within the Parton-Hadron-String Dynamics (PHSD) transport approach
• Shear Viscosities from the Chapman-Enskog and the Relaxation Time Approaches
• Heavy quark production at RHIC and LHC within a partonic transport model
• Low mass dilepton production at ultrarelativistic energies
• Charmonium in strongly coupled quark-gluon plasma
• Measurements of $\mu \mu$ pairs from open heavy flavor and Drell-Yan in $p+p$ collisions at $\sqrt{s}=200$ GeV
• Two-photon dilepton production in proton-proton collisions: two alternative approaches
• Upsilon (1S+2S+3S) production in d+Au and p+p collisions at sqrt(s_NN)=200 GeV and cold-nuclear matter effects
• Heavy-flavor production in heavy-ion collisions and implications for the properties of hot QCD matter
• Dilepton flow and deconfinement phase transition in heavy ion collisions
• Dielectron and heavy-quark production in inelastic and high-multiplicity proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Energy, centrality and momentum dependence of dielectron production at collider energies in a coarse-grained transport approach
• Cross section for $b\bar{b}$ production via dielectrons in d$+$Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Dielectron production in proton-proton collisions at $\sqrt{s}$ = 7 TeV
• Dilepton production in p+p, Cu+Cu and Au+Au collisions at 200 AGeV
• Di-electron production from vector mesons with medium modifications in heavy ion collisions
• Charm quarks in medium and their contribution to di-electron spectra in relativistic heavy ion collisions
• Electromagnetic Probes
• Measurements of $e^{+}{e}^{-}$ pairs from open heavy flavor in $p$+$p$ and $d$+$A$ collisions at $\sqrt{s_{NN}}=200$ GeV
• Open charm meson production at BNL RHIC within $k_t$-factorization approach and revision of their semileptonic decays
• Kinematical correlations of dielectrons from semileptonic decays of heavy mesons and Drell-Yan processes at BNL RHIC
• Photons and low-mass dileptons: results from PHENIX
• Dielectron Azimuthal Anisotropy at mid-rapidity in Au+Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Review of QCD, Quark-Gluon Plasma, Heavy Quark Hybrids, and Heavy Quark State production in p-p and A-A collisions
• Dilepton production in the strongly interacting quark-gluon plasma
• Dileptons and Photons at RHIC Energies
• Soft-dielectron excess in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Next-to-Leading Order QCD Corrections to Heavy Quark Correlations in Longitudinally Polarized Hadron-Hadron Collisions
• Quarkyonic Percolation and deconfinement at finite density and number of colors
• Dilepton production from parton interactions in the early stage of relativistic heavy-ion collisions
• Light Vector Mesons
• Measurability of phi, omega and rho mesons via di-electron decays in high-temperature states produced in heavy-ion collisions
• Dilepton radiation measured in PHENIX probing the strongly interacting matter created at RHIC
• Open Heavy Flavor at PHENIX
• Overview of electromagnetic probes in ultra-relativistic heavy-ion collisions
• Measurement of Non-photonic Electrons in p + p Collisions at $\sqrt{s_{NN}}$ = 200 GeV with reduced detector material in STAR
• Dielectron production in Au$+$Au collisions at $\sqrt{s_{NN}}$=200 GeV
• Open Heavy Flavor Production in Heavy Ion Collisions
• Dileptons from the nonequilibrium Quark-Gluon Plasma
• D Production In p-p and d-Au Collisions
• Di-electron Continuum at PHENIX
• Production of D and B mesons and their semileptonic decays
• B Production In p-p and A-A Collisions
• Production of charm and bottom quarks in $p+p$ collisions at 200GeV
• Early times and thermalization in heavy ion collisions: a summary of experimental results for photons, light vector mesons, open and hidden heavy flavors
• Dilepton production in proton-proton collisions at top RHIC energy
• Production of $b\bar{b}$ at forward rapidity in $p$+$p$ collisions at $\sqrt{s}=510$ GeV
• Hadronic vs. partonic J/psi production in the Statistical Hadronization Model