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- W4311123981 abstract "Within a transport model, we study effects of the momentum dependence of nuclear symmetry potential on pion observables in central Sn + Sn collisions at 270 MeV/nucleon. To this end, a quantity $U_{sym}^{infty}(rho_{0})$, i.e., the value of nuclear symmetry potential at the saturation density $rho_{0}$ and infinitely large nucleon momentum, is used to characterise the momentum dependence of nuclear symmetry potential. It is shown that with a certain $L$ (i.e., slope of nuclear symmetry energy at $rho_{0}$) the characteristic parameter $U_{sym}^{infty}(rho_{0})$ of symmetry potential affects significantly the production of $pi^{-}$ and $pi^{+}$ as well as their pion ratios. Moreover, through comparing the charged pion yields, pion ratios as well the spectral pion ratios of theoretical simulations for the reactions $^{108}$Sn + $^{112}$Sn and $^{132}$Sn + $^{124}$Sn with the corresponding data in S$pi$RIT experiments, we find that our results favor a constraint on $U_{sym}^{infty}(rho_{0})$, i.e., $-160^{+18}_{-9}$~MeV, and the $L$ is also suggested within a range, i.e., $62.7<L<93.1$~MeV. In addition, it is shown that the pion observable of $^{197}$Au + $^{197}$Au collisions at 400~MeV/nucleon also supports the extracted value for $U_{sym}^{infty}(rho_{0})$." @default.
- W4311123981 created "2022-12-23" @default.
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- W4311123981 date "2022-12-01" @default.
- W4311123981 modified "2023-10-01" @default.
- W4311123981 title "Effects of the momentum dependence of nuclear symmetry potential on pion observables in Sn + Sn collisions at 270 MeV/nucleon" @default.
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- W4311123981 doi "https://doi.org/10.1007/s41365-022-01146-3" @default.
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