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Stopped Δ-matter source in heavy-ion collisions at 10 GeV/nucleon?
We predict the formation of highly dense baryon-rich resonance matter in Au+Au collisions at the Brookhaven Alternating Gradient Synchrotron (AGS) energies. The final pion yields show observable signs for resonance matter. The ${\mathrm{\ensuremath{\Delta}}}_{1232}$ resonance is predicted to be the dominant source for pions of small transverse momenta. Rescattering effects---consecutive excitation …