Effect of the momentum dependence of nuclear symmetry potential on pion-/pion+ ratio in heavy-ion collisions

TL;DR

This study investigates how the momentum dependence of nuclear symmetry potential influences the pion-/pion+ ratio in heavy-ion collisions, revealing its impact on nuclear density, resonance production, and pion ratios.

Contribution

It introduces a detailed analysis of the momentum dependence of nuclear symmetry potential effects within an isospin-dependent transport model, highlighting its influence on collision dynamics.

Findings

Momentum dependence increases nuclear compressed density.

It raises the number of produced resonances and pions.

It enhances the pion-/pion+ ratio in collisions.

Abstract

In the framework of the isospin-dependent Boltzmann-Uehling-Uhlenbeck transport model, effect of the momentum dependence of nuclear symmetry potential on pion-/pion+ ratio in the neutron-rich reaction 132Sn+124Sn at a beam energy of 400 MeV/nucleon is studied. We find that the momentum dependence of nuclear symmetry potential affects the compressed density of colliding nuclei, numbers of produced pion- and pion+, as well as the value of pion-/pion+ ratio. The momentum dependent nuclear symmetry potential increases the compressed density of colliding nuclei, numbers of produced resonances delta(1232), N*(1440), pion- and pion+, as well as the value of pion-/pion+ ratio.