Spheroidal expansion and freeze-out geometry of heavy-ion collisions in the few-GeV energy regime

Abstract

A spheroidal model of the expansion of hadronic matter produced in heavy-ion collisions in the few-GeV energy regime is proposed. It constitutes an extension of the spherically symmetric Siemens-Rasmussen blast-wave model used in our previous works. The spheroidal form of the expansion, combined with a single-freeze-out scenario, allows for a significantly improved description of both the transverse-mass and the rapidity distributions of the produced particles. With the model parameters determined by the hadronic abundances and spectra, we make further predictions of the pion HBT correlation radii that turn out to be in a qualitative agreement with the measured ones. The overall successful description of the data supports the concept of spheroidal symmetry of the produced hadronic systems in this energy range.

References in corpus (10)

• Therminator: Thermal heavy-Ion generator
• Chiral phase structure and critical end point in QCD
• Resolving the HBT Puzzle in Relativistic Heavy Ion Collision
• Relativistic nuclear collisions: Establishing a non-critical baseline for fluctuation measurements
• Centrality dependence of hadronization and chemical freeze-out conditions in heavy ion collisions at \sqrt s_{NN} = 2.76 TeV
• Femtoscopy in hydro-inspired models with resonances
• Sub-threshold production of K^{0}_{s} mesons and Λ hyperons in Au(1.23A GeV)+Au
• Statistical hadronization model for heavy-ion collisions in a few GeV energy regime
• Charged pion production in $\mathbf{Au}+\mathbf{Au}$ collisions at $\sqrt{{\mathbf{s}}_{\mathbf{NN}}}$ = 2.4$\mathbf{GeV}$
• Ambiguities in the hadro-chemical freeze-out of Au+Au collisions at SIS18 energies and how to resolve them

Cited by in corpus (2)

• Spectra and elliptic flow of light hadrons in an expanding fire-cylinder model for the RHIC Beam Energy Scan
• ${}^3$H and ${}^3$He nuclei production in a combined thermal and coalescence framework for heavy-ion collisions in the few-GeV energy regime