Resonance Absorption and Regeneration in Relativistic Heavy Ion   Collisions
  The regeneration of hadronic resonances is discussed for heavy ion collisions at SPS and SIS-300 energies. The time evolutions of Delta, rho and phi resonances are investigated. Special emphasize is put on resonance regeneration after chemical freeze-out. The emission time spectra of experimentally detectable resonances are explored. 
Sascha Vogel and Marcus Bleicher