Energy dependence of pion in-medium effects on π^-/π^+ ratio in heavy-ion collisions

Abstract

Within the framework of a thermal model with its parameters fitted to the results from an isospin-dependent Boltzmann-Uehling-Uhlenbeck (IBUU) transport model, we study the pion in-medium effect on the charged-pion ratio in heavy-ion collisions at various energies. We find that due to the cancellation between the effects from pion-nucleon s-wave and p-wave interactions in nuclear medium, the π^-/π^+ ratio generally decreases after including the pion in-medium effect. The effect is larger at lower collision energies as a result of narrower pion spectral functions at lower temperatures.

4 pages, 4 figures, 1 table, minor modifications, version to appear in Physical Review C

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Cited by in corpus (30)

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• Effects of a phase transition on two-pion interferometry in heavy-ion collisions at $\sqrt{s_{\mathrm{NN}}}=2.4-7.7$ GeV
• Influence of neutron-skin thickness on ${\pi }^{-}/{\pi }^{+}$ ratio in Pb+Pb collisions
• Insights on pion production mechanism and symmetry energy at high density
• Symmetry potential of $\Delta (1232)$ resonance and its effects on the ${\pi }^{-}/{\pi }^{+}$ ratio in heavy-ion collisions near the pion production threshold
• Symmetry energy systematics and its high density behavior
• Flow probe of symmetry energy in relativistic heavy-ion reactions
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• Modeling pion production in heavy-ion collisions at intermediate energies
• In-medium and isospin effects on particle production near threshold energies in heavy-ion collisions
• Normal or abnormal isospin-fractionation as a qualitative probe of nuclear symmetry energy at supradensities
• 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
• Effects of energy conservation on equilibrium properties of hot asymmetric nuclear matter
• Symmetry energy extracted from the S$\pi$RIT pion data in Sn+Sn systems
• Isospin splitting of pion elliptic flow in relativistic heavy-ion collisions
• Heavy-ion Collisions: Direct and indirect probes of the density and temperature dependence of Esym
• Effects of nuclear symmetry energy and in-medium NN cross section in heavy-ion collisions at beam energies below the pion production threshold
• Effects of Pauli blocking on pion production in central collisions of neutron-rich nuclei
• High Density with Elliptic Flows
• RMF models with $\sigma$-scaled hadron masses and couplings for description of heavy-ion collisions below 2A GeV
• Effects of hadronic mean-field potentials on Hanbury-Brown-Twiss correlations in relativistic heavy-ion collisions
• Probing in-medium nucleon-nucleon inelastic scattering cross section by using energetic n/p ratio
• Nucleon-$\Delta$ elastic cross section in isospin-asymmetric nuclear medium with inclusion of scalar-isovector $\delta$ meson field
• Angular momentum conservation and pion production in intermediate-energy heavy-ion collisions
• In-medium effects of nucleon-nucleon cross sections in heavy-ion collisions