The influence of reconstruction criteria on the sensitive probes of the symmetry potential

TL;DR

This paper investigates how different reconstruction criteria in heavy-ion collisions influence sensitive probes of the symmetry potential, revealing that reconstruction methods significantly affect neutron/proton ratios at low momenta and $$ ratios at high energies.

Contribution

It systematically analyzes the impact of various cluster construction and resonance tracing criteria on observables related to the symmetry potential using the updated UrQMD model.

Findings

Phase-space and density criteria affect neutron/proton ratios at low transverse momenta.

Reconstruction methods significantly influence $$ ratios at high kinetic energies.

Influence of criteria diminishes at large transverse momenta.

Abstract

Different criteria of constructing clusters and tracing back $\Delta$ resonances from the intermediate-energy neutron-rich HICs are discussed by employing the updated UrQMD transport model. It is found that both the phase-space and the coordinate-density criteria affect the single and the double neutron/proton ratios of free nucleons at small transverse momenta, but the influence becomes invisible at large transverse momenta. The effect of different methods of reconstructing freeze-out $\Delta$s on the $\Delta^0/\Delta^{++}$ ratio is strong in a large kinetic energy region.