Statistical hadronization model for heavy-ion collisions in a few GeV energy regime

Understand

We show that the transverse-mass and rapidity spectra of protons and pions produced in Au-Au collisions at sqrt(sNN) = 2.4 GeV can be well reproduced in a thermodynamic model assuming single freeze-out of particles from a spherically symmetric hypersurface.

• This scenario corresponds to a physical picture used by Siemens and Rasmussen in the original formulation of the blast-wave model.
• Our framework modifies and extends this approach by incorporation of a Hubble-like expansion of QCD matter and inclusion of resonance decays.
• In particular, the Delta(1232) resonance is taken into account, with a width obtained from the virial expansion.