Effects of pion potential and nuclear symmetry energy on the ${\pi }^{-}/{\pi }^{+}$ ratio in heavy-ion collisions at beam energies around the pion production threshold

Abstract

Within the framework of the isospin-dependent Boltzmann-Uehling-Uhlenbeck(IBUU) transport model, we studied the effects of the pion potential and the symmetry energy on the pion production in the central ${}^{197}Au{+}^{197}Au$ collisions around the pion production threshold. It is found that the pion potential has opposite effects on the value of ${\pi }^{-}/{\pi }^{+}$ ratio at low and high pion energies. The effect of the pion potential on the total ${\pi }^{-}/{\pi }^{+}$ ratio becomes larger in heavy-ion collisions at beam energies below the pion production threshold. And at beam energies below the pion production threshold, with the pion potential, the effect of the symmetry energy on the ${\pi }^{-}/{\pi }^{+}$ ratio becomes smaller compared with that above the pion production threshold.

arXiv comment13 pages, 10 figures, PRC in production

References in corpus (23)

• The Physics of Neutron Stars
• Recent Progress and New Challenges in Isospin Physics with Heavy-Ion Reactions
• Isospin Asymmetry in Nuclei and Neutron Stars
• Reaction Dynamics with Exotic Beams
• Circumstantial evidence for a soft nuclear symmetry energy at supra-saturation densities
• Probing the High Density Behaviour of Nuclear Symmetry Energy with High Energy Heavy-Ion Collisions
• Momentum dependence of symmetry potential in asymmetric nuclear matter for transport model calculations
• Systematics of pion emission in heavy ion collisions in the 1A GeV regime
• Effects of momentum-dependent symmetry potential on heavy-ion collisions induced by neutron-rich nuclei
• Probing high-density behavior of symmetry energy from pion emission in heavy-ion collisions
• Isospin effects on sub-threshold kaon production at intermediate energies
• Near-threshold pion production with radioactive beams at the Rare Isotope Accelerator
• Constraining the neutron-proton effective mass splitting in neutron-rich matter
• Subthreshold pion production within a transport description of central Au+Au collisions
• Aspects of particle production in isospin asymmetric matter
• Probing the equation of state with pions
• Single and double pi^{-}/pi^{+} ratios in heavy-ion reactions as probes of the high-density behavior of the nuclear symmetry energy
• Energy dependence of pion in-medium effects on π^-/π^+ ratio in heavy-ion collisions
• Probing the Nuclear Symmetry Energy with Heavy-Ion Reactions Induced by Neutron-Rich Nuclei
• Normal or abnormal isospin-fractionation as a qualitative probe of nuclear symmetry energy at supradensities
• The influence of the symmetry energy on the cone-azimuthal emission
• Effect of the momentum dependence of nuclear symmetry potential on pion-/pion+ ratio in heavy-ion collisions
• Medium effects on charged pion ratio in heavy ion collisions

Cited by in corpus (19)

• Medium effects on pion production in heavy ion collisions
• Constraining the density dependence of the symmetry energy using the multiplicity and average $p_T$ ratios of charged pions
• Insights on pion production mechanism and symmetry energy at high density
• Modeling pion production in heavy-ion collisions at intermediate energies
• Cross-checking the symmetry energy at high densities
• Symmetry energy extracted from the S$\pi$RIT pion data in Sn+Sn systems
• Effect of Delta potential on the pion-/pion+ ratio in heavy-ion collisions at intermediate energies
• Collective flows of pions in Au+Au collisions at energies 1.0 and 1.5 GeV/nucleon
• Effects of symmetry energy in ${}^{132}\mathrm{Sn}{+}^{124}\mathrm{Sn}$ reaction at 300 MeV/nucleon
• Examination of an isospin-dependent single-nucleon momentum distribution for the isospin-asymmetric nuclear matter in heavy-ion collisions
• Effects of retarded electrical fields on observables sensitive to the high-density behavior of nuclear symmetry energy in heavy-ion collisions at intermediate energies
• Beam energy dependence of the relativistic retardation effects of electrical fields on the ${\pi }^{-}/{\pi }^{+}$ ratio in heavy-ion collisions
• Determination of the density region of the symmetry energy probed by the ${\pi }^{-}/{\pi }^{+}$ ratio
• Blind spots of probing the high-density symmetry energy in heavy-ion collisions
• Probing in-medium nucleon-nucleon inelastic scattering cross section by using energetic n/p ratio
• Effects of an induced electric field on π^{-}/π^{+} ratio in heavy-ion collisions
• A possible probe of the new fifth force
• On the spin-isospin decomposition of nuclear symmetry energy
• In-medium pion dispersion relation and medium correction of $N\pi \leftrightarrow \Delta$ near the threshold energy of pion production