meson broadening and dilepton production in heavy ion collisions
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 meson in matter seems to be consistent with some current interpretations of the e+ e- mass spectra measured at the CERN/SPS.
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