In-Medium Vector Mesons, Dileptons and Chiral Restoration

Abstract

Medium modifications of the electromagnetic spectral function in hadronic and quark-gluon matter are reviewed. A strong broadening of the $\rho$ meson, which dominates the spectral function in the low-mass regime, is quantitatively consistent with dilepton excess spectra measured in photoproduction off cold nuclei (CLAS/JLab) and in fixed-target ultrarelativistic heavy-ion collisions (NA45,NA60/CERN-SPS). The large excess observed by PHENIX at RHIC remains unexplained to date, but is most likely not due to emission from the Quark-Gluon Plasma. Connections to thermal lattice QCD promise progress in the search for chiral symmetry restoration.

9 pages, 12 figures, Proceedings of Chiral 2010 (Valencia, June 21-24, 2010)

References in corpus (1)

• The Chiral Restoration Transition of QCD and Low Mass Dileptons

Cited by in corpus (10)

• Thermal Correlators in the ρ channel of two-flavor QCD
• Analysis of dilepton production in Au+Au collisions at sqrt(s_NN)=200 GeV within the Parton-Hadron-String Dynamics (PHSD) transport approach
• In-medium hadronic spectral functions through the soft-wall holographic model of QCD
• Rho-meson resonance broadening in QCD at finite temperature
• Energy, centrality and momentum dependence of dielectron production at collider energies in a coarse-grained transport approach
• Can transport peak explain the low-mass enhancement of dileptons at RHIC?
• Kelvin-Helmholz instability in high energy heavy ion collisions
• Low-mass dilepton production through transport process in quark-gluon plasma
• The structure of the f_0(980) from system size dependent hadronic resonance ratios in p+p, p+Pb, and Pb+Pb collisions at the LHC
• Holographic vector mesons in a hot and dense medium