Decomposition of sensitivity of the symmetry energy observables

Abstract

To exactly answer which density region that some frequently used symmetry-energy-sensitive observables probe, for the first time, we make a study of decomposition of the sensitivity of some symmetry-energy-sensitive observables. It is found that for the Au+Au reaction at incident beam energies of 200 and 400 MeV/nucleon, frequently used symmetry-energy-sensitive observables mainly probe the density-dependent symmetry energy around 1.25${\rho }_0$ (for pionic observables) or 1.5${\rho }_0$ (for nucleonic observables). Effects of the symmetry energy in the low-density region is in general small but observable. The fact that the symmetry-energy-sensitive observables are not sensitive to the symmetry energy in the maximal baryon-density region increases the difficulty of studying nuclear symmetry energy at super-density.

4 pages, 6 figures, accepted by PRC

References in corpus (6)

• Neutron Star Observations: Prognosis for Equation of State Constraints
• Distribution of the largest fragment in the Lattice Gas Model
• Probing the symmetry energy and the degree of isospin equilibrium
• Normal or abnormal isospin-fractionation as a qualitative probe of nuclear symmetry energy at supradensities
• Neutron-proton bremsstrahlung from intermediate energy heavy-ion reactions as a probe of the nuclear symmetry energy?
• Probing the momentum-dependence of the symmetry potential by the free n/p ratio of preequilibrium emission

Cited by in corpus (6)

• Results of the ASY-EOS experiment at GSI: The symmetry energy at suprasaturation density
• Insights on pion production mechanism and symmetry energy at high density
• Quiescent luminosities of transiently accreting neutron stars with neutrino heating due to charged pion decay
• In-medium $\Delta (1232)$ potential, pion production in heavy-ion collisions and the symmetry energy
• Isospin blocking and its effects in heavy-ion collisions
• An overview of symmetric nuclear matter properties from chiral interactions up to fourth order of the chiral expansion