$Ï$ meson broadening and dilepton production in heavy ion collisions
arXiv:nucl-th/9906087 · doi:10.1016/S0375-9474(99)85079-9
Abstract
The modification of the width of the rho meson due to in-medium decays and collisions is evaluated. In high temperature and/or high density hadronic matter, the collision width is much larger than the one-loop decay width. The large width of the $Ï$ meson in matter seems to be consistent with some current interpretations of the $e^+ e^-$ mass spectra measured at the CERN/SPS.
4 pages, LaTeX, including 4 Postscript figures, to appear in Proc. of QM'99, Nucl. Phys. A