The influence of the symmetry energy on the cone-azimuthal emission

Abstract

In the framework of the isospin-dependent Boltzmann-Uehling-Uhlenbeck transport model, effects of the symmetry energy on the evolutions of free n/p ratio and charged pion ratio in the semi-central collision of ${}^{197}$Au+${}^{197}$Au at an incident beam energy of 400 MeV/nucleon are studied. At the beginning of the reaction (before 11 fm/c) they are both affected by the low-density behavior of the symmetry energy but soon after are affected by the high-density behavior of the symmetry energy after nuclei are compressed (after 11 fm/c) and the effects of the symmetry energy are generally smaller compared with the central collision case. Interestingly, their dependences on the symmetry energy are shown to arise with increase of cone-azimuthal angle of the emitted particles. In the direction perpendicular to the reaction plane, the ${\pi }^{-}/{\pi }^{+}$ ratio or free n/p ratio especially at high kinetic energies exhibits significant sensitivity to the symmetry energy.

4 pages, 3 figures

References in corpus (7)

• Symmetry energy from elliptic flow in 197Au + 197Au
• Systematics of pion emission in heavy ion collisions in the 1A GeV regime
• Isospin effects on sub-threshold kaon production at intermediate energies
• Towards a model-independent constraint of the high-density dependence of the symmetry energy
• The neutron/proton ratio of squeezed-out nucleons and the high density behavior of the nuclear symmetry energy
• Effect of the momentum dependence of nuclear symmetry potential on pion-/pion+ ratio in heavy-ion collisions
• Model dependence of isospin sensitive observables at high densities

Cited by in corpus (13)

• Modeling pion production in heavy-ion collisions at intermediate energies
• 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 the high-momentum tail of nucleon momentum distribution on the isospin-sensitive observables
• 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 symmetry energy in ${}^{132}\mathrm{Sn}{+}^{124}\mathrm{Sn}$ reaction at 300 MeV/nucleon
• Competition between Coulomb and Symmetry Potential in Semi-peripheral Heavy-ion Collisions
• Symmetry energy at subsaturation densities and the neutron skin thickness of 208Pb
• Determination of the density region of the symmetry energy probed by the ${\pi }^{-}/{\pi }^{+}$ ratio
• Probing the density dependence of the symmetry energy by nucleon flow
• A new probe to study symmetry energy at low density by deuteron breakup reaction
• Pion production and absorption in heavy-ion collisions
• Probing in-medium nucleon-nucleon inelastic scattering cross section by using energetic n/p ratio
• Production Cross Section of Neutron-Rich Calcium Isotopes in Heavy Ion Collisions