Abstract
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 Δ resonances. The transverse momentum spectra of pions are well reproduced by adding the pions originating from the Δ -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 Δ states at freeze-out for beam energies of 1 and 2 AGeV, respectively.
Original language | English |
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Pages (from-to) | 115-120 |
Number of pages | 6 |
Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 407 |
Issue number | 2 |
DOIs | |
Publication status | Published - 1997 Aug 28 |
Externally published | Yes |
Keywords
- Freeze-out
- Pion
- Thermal model
- δResonance
ASJC Scopus subject areas
- Nuclear and High Energy Physics