Abstract
We explore the properties of the last generation of ρ(770) and K⁎(892) resonances created in Au+Au reactions at Elab=1.23AGeV via the reconstruction in the hadronic channel using the UrQMD model. Such resonance studies allow to obtain detailed information on the emission source in such reactions in a complementary way to di-lepton or HBT studies. We observe a freeze-out hierarchy and predict mass shifts for the ρ(770) resonance (Δmρ≈−330 MeV) and the K⁎(892) resonance (ΔmK⁎≈−30 MeV). These mass shifts are related to the regeneration cycles of each resonance species and are of purely kinetic origin. Experimentally our predictions can be tested using the GSI-HADES experiment or the lowest RHIC-BES energy.
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