In-Medium Vector Mesons, Dileptons and Chiral Restoration
Nuclear Theory
2011-01-25 v1 High Energy Physics - Phenomenology
Abstract
Medium modifications of the electromagnetic spectral function in hadronic and quark-gluon matter are reviewed. A strong broadening of the 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.
Cite
@article{arxiv.1010.1719,
title = {In-Medium Vector Mesons, Dileptons and Chiral Restoration},
author = {Ralf Rapp},
journal= {arXiv preprint arXiv:1010.1719},
year = {2011}
}
Comments
9 pages, 12 figures, Proceedings of Chiral 2010 (Valencia, June 21-24, 2010)