Abstract
We formulate a thermal model by considering the longitudinal flow, the modification of the Δ(1232)-spectral function, and the Coulomb interaction. The model calculations are compared with the transverse momentum and rapidity spectra of charged pions in central Ru + Ru collisions at 400A and 1528.A MeV. The average longitudinal flow velocities of the fireball are deduced to be about 18 and 24% of the speed of light at 400A and 1528A MeV, respectively. It is also possible that the origin of the longitudinally elongated pion spectra is due to an incomplete stopping of the projectile and the target nuclei.
| Original language | English |
|---|---|
| Pages (from-to) | 1083-1089 |
| Number of pages | 7 |
| Journal | Journal of the Korean Physical Society |
| Volume | 46 |
| Issue number | 5 |
| Publication status | Published - 2005 May |
Keywords
- Charged pions
- Heavy-ion collisions
- Longitudinal expansion
- Nuclear stopping
- Thermal model
ASJC Scopus subject areas
- Physics and Astronomy(all)