Abundance of Delta Resonances in 58Ni+58Ni Collisions between 1 and 2 AGeV


Abundance of Delta Resonances in 58Ni+58Ni Collisions between 1 and 2 AGeV

Hong, B. E. A.; Kotte, R.; Mösner, J.; Neubert, W.; Wohlfarth, D.; Bieganski, J.

Charged pion spectra measured in 58Ni+58Ni collisions at 1, 06, 1.45 and 1.93 AGeV are interpreted in terms of a thermal model including the decay of Delta resonances. The transverse momentum spectra of pions are well reproduced by adding the pions originating from the Delta-resonance decay to the component of thermal pions, deduced from the high transverse momentum part of the pion spectra. about 10 and 18% of the nucleons are excited to Delta states at freeze-out for beam energies of 1 and 2 AGeV, respectively

Keywords: PACS numbers: 25.75.-q; 25.75.Dw

  • Phys. Lett. B 407 (1997) 115

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Publ.-Id: 4101