Low Mass Dimuons Produced in Relativistic Nuclear Collisions

Abstract

The NA60 experiment has measured low-mass muon pair production in In-In collisions at 158 A GeV with unprecedented precision. We show that this data is reproduced very well by a dynamical model with parameters scaled from fits to measurements of hadronic transverse mass spectra and Hanbury-Brown and Twiss correlations in Pb-Pb and Pb-Au collisions at the same energy. The data is consistent with in-medium properties of $\rho$ and $\omega$-mesons at finite temperature and density as deduced from empirical forward-scattering amplitudes. Inclusion of the vacuum decay of the $\rho$-meson after freeze-out is necessary for an understanding of the mass and transverse momentum spectrum of dimuons with $M \apprle 0.9 {\rm GeV}/c^2$.

4 pages, 3 figures, updated hadronic analysis

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Cited by in corpus (58)

• Properties of hot and dense matter from relativistic heavy ion collisions
• Hadrons in strongly interacting matter
• Evidence for the production of thermal muon pairs with masses above 1 GeV/c^2 in 158A GeV Indium-Indium Collisions
• Dilepton production and off-shell transport dynamics at SIS energies
• NA60 results on thermal dimuons
• The Chiral Restoration Transition of QCD and Low Mass Dileptons
• Measurements of Dielectron Production in Au$+$Au Collisions at $\sqrt{s_{\mathrm{NN}}}$ = 200 GeV from the STAR Experiment
• Dielectron Mass Spectra from Au+Au Collisions at $\sqrt{s_{\mathrm{NN}}}$ = 200 GeV
• Thermal Dileptons from Coarse-Grained Transport as Fireball Probes at SIS Energies
• Dilepton emission in high-energy heavy-ion collisions with viscous hydrodynamics
• Dilepton production in proton-induced reactions at SIS energies with the GiBUU transport model
• Dilepton production and reaction dynamics in heavy-ion collisions at SIS energies from coarse-grained transport simulations
• Dilepton production in nucleus-nucleus collisions at top SPS energy within the Parton-Hadron-String Dynamics (PHSD) transport approach
• Low mass dilepton production at ultrarelativistic energies
• Coherent lepton pair production in hadronic heavy ion collisions
• Dilepton excess from local parity breaking in baryon matter
• Production and evolution path of dileptons at HADES energies
• A coarse-graining approach for dilepton production at SPS energies
• Dilepton Radiation in Heavy-Ion Collisions at Small Transverse Momentum
• Dilepton production in proton-proton and quasifree proton-neutron reactions at 1.25 GeV
• Thermal dileptons at SPS energies
• QCD sum rules for rho mesons in vacuum and in-medium, re-examined
• Measurement of dielectron production in central Pb-Pb collisions at $\sqrt{{\text{s}}_{\mathrm{NN}}}$ = 2.76 TeV
• $\varphi$ Production in In-In Collisions at 158 AGeV
• Dimuon radiation at the CERN SPS within a (3+1)d hydrodynamic+cascade model
• Dilepton flow and deconfinement phase transition in heavy ion collisions
• How Sensitive are Di-Leptons from Rho Mesons to the High Baryon Density Region?
• Temperature Effect on Shear and Bulk Viscosities of QCD Matter
• Dielectron production in proton-proton collisions at $\sqrt{s}$ = 7 TeV
• Di-electron production from vector mesons with medium modifications in heavy ion collisions
• Transverse momentum spectra of dileptons at NA60
• Analysis of dilepton angular distributions in a parity breaking medium
• Charm quarks in medium and their contribution to di-electron spectra in relativistic heavy ion collisions
• Electromagnetic Probes
• Observing many body effects on lepton pair production from low mass enhancement and flow at RHIC and LHC energies
• Dilepton production in nucleon-nucleon collisions reexamined
• Elliptic flow of thermal dileptons in event-by-event hydrodynamic simulation
• Muon pairs from In+In collision at SPS energy
• Radial Flow from Electromagnetic Probes and Signal of Quark Gluon Plasma
• Update on Chiral Symmetry Restoration in the Context of Dilepton Data
• The phi meson at high temperatures and densities
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• Thermal photon to dilepton ratio in ultra-relativistic heavy ion collisions
• Joint description of the e+e- annihilation into both four-pion channels
• Dilepton production at SIS energies with the GiBUU transport model
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• Heavy Flavor, Quarkonia, and Electroweak Probes at Quark Matter 2012
• Dielectron production in 200 GeV p+p and Au+Au collisions at STAR
• Dileptons in Heavy-Ion Collisions
• A Hidden Local Field Theory Description of Dileptons in Relativistic Heavy Ion Collisions
• Dielectron production in Au$+$Au collisions at $\sqrt{s_{NN}}$=200 GeV
• Thermal dileptons in high-energy nuclear collisions
• Dilepton production in nucleon-nucleon collisions around 1 GeV/nucleon: a theoretical update
• Thermal Dimuon Emission in In-In at the CERN SPS
• Selfconsistent descriptions of vector-mesons in hot matter revisited
• Dilepton creation based on an analytic hydrodynamic solution
• Dileptons in a coarse-grained transport approach
• Dileptons and Direct Photons at SPS