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.

arXiv comment4 pages, 6 figures, accepted by PRC

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Cited by in corpus (13)

• Results of the ASY-EOS experiment at GSI: The symmetry energy at suprasaturation density
• 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
• Cross-checking the symmetry energy at high densities
• Nuclear symmetry energy and the role of three-body forces
• Effect of Delta potential on the pion-/pion+ ratio in heavy-ion collisions at intermediate energies
• Effects of symmetry energy in ${}^{132}\mathrm{Sn}{+}^{124}\mathrm{Sn}$ reaction at 300 MeV/nucleon
• 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
• 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
• An overview of symmetric nuclear matter properties from chiral interactions up to fourth order of the chiral expansion
• Isospin blocking and its effects in heavy-ion collisions