Abstract
The transverse momentum spectra of secondary mesons and participant protons in central C+C and C+Ta interactions at GeV/c beam momentum have been analyzed within a collective flow model and a boundary model. All the particle spectra within a collective flow model at a given beam energy can be reproduced with a single set of intensive parameters for the initial state of fireball. As typical freeze-out parameters in this beam energy region we find a freeze-out temperature and an average transverse expansion velocity at freeze-out The pion spectra within a boundary model including the quantum mechanical effects can be described well. To fit the proton spectra well, within a boundary model, one will need to introduce the transverse collective expansion.
- Received 15 February 2000
DOI:https://doi.org/10.1103/PhysRevC.62.064902
©2000 American Physical Society