NUKLEONIKA 2004, 49(Supplement 2):s115-s118
Sergiy V. Akkelin1, Maryna S. Borysova2, Yuri M. Sinyukov1
1 Bogolyubov Institute for Theoretical Physics, 14b Metrologichna Str., Kiev 03143, Ukraine,
2 Taras Shevchenko National University, 64 Volodymirs’ka Str., Kiev 01033, Ukraine
The transverse spectra and interferometry volume of thermal pions in A+A collisions were estimated basing
on the chemically frozen hydrodynamic evolution that incorporates the decays of resonances at the
freeze-out stage. We found that the resonance decays could increase significantly the pion
interferometry volume, while the pion spectra slopes are not affected much by the decays in the region
up to transverse momentum 1 GeV. We also notice that in such a model the resonance contributions
reduce the ratio of outward to sideward interferometry radii.