Constraining the nuclear symmetry energy from electric dipole polarizability and neutron skin in $^{208}\mathrm{Pb}$ within antisymmetrized molecular dynamics

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Main Authors: Niu, Dandan, Wang, Xinyu, Cui, Ying, Zhao, Qiang, Zhao, Kai, Ono, Akira, Zhang, Yingxun
Format: Preprint
Published: 2026
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author Niu, Dandan
Wang, Xinyu
Cui, Ying
Zhao, Qiang
Zhao, Kai
Ono, Akira
Zhang, Yingxun
author_facet Niu, Dandan
Wang, Xinyu
Cui, Ying
Zhao, Qiang
Zhao, Kai
Ono, Akira
Zhang, Yingxun
contents The electric dipole polarizability $α_D$ and the neutron skin thickness $ΔR_{np}$ of $^{208}\mathrm{Pb}$ are two powerful and clean probes to constrain the symmetry energy at subsaturation density. Within the framework of the antisymmetrized molecular dynamics (AMD) model, we found that the sensitive densities of $α_D$ and $ΔR_{np}$ ranges from the 0.2$ρ_0$ to 0.57$ρ_0$. To well describe the data of $α_D$ and $ΔR_{np}$, the effective interaction parameters with $S_0\sim34$ MeV and $L=66-75$ MeV are favored. The constraints of symmetry energy over the density ranging from 0.2$ρ_0$ to 0.57$ρ_0$ are obtained, and the values of symmetry energy at the starting and ending density region are $S(ρ=0.2ρ_0)=10.5\pm 0.63$ MeV and $S(ρ=0.57ρ_0)=23.1\pm 0.4$ MeV.
format Preprint
id arxiv_https___arxiv_org_abs_2602_19039
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle Constraining the nuclear symmetry energy from electric dipole polarizability and neutron skin in $^{208}\mathrm{Pb}$ within antisymmetrized molecular dynamics
Niu, Dandan
Wang, Xinyu
Cui, Ying
Zhao, Qiang
Zhao, Kai
Ono, Akira
Zhang, Yingxun
Nuclear Theory
Nuclear Experiment
The electric dipole polarizability $α_D$ and the neutron skin thickness $ΔR_{np}$ of $^{208}\mathrm{Pb}$ are two powerful and clean probes to constrain the symmetry energy at subsaturation density. Within the framework of the antisymmetrized molecular dynamics (AMD) model, we found that the sensitive densities of $α_D$ and $ΔR_{np}$ ranges from the 0.2$ρ_0$ to 0.57$ρ_0$. To well describe the data of $α_D$ and $ΔR_{np}$, the effective interaction parameters with $S_0\sim34$ MeV and $L=66-75$ MeV are favored. The constraints of symmetry energy over the density ranging from 0.2$ρ_0$ to 0.57$ρ_0$ are obtained, and the values of symmetry energy at the starting and ending density region are $S(ρ=0.2ρ_0)=10.5\pm 0.63$ MeV and $S(ρ=0.57ρ_0)=23.1\pm 0.4$ MeV.
title Constraining the nuclear symmetry energy from electric dipole polarizability and neutron skin in $^{208}\mathrm{Pb}$ within antisymmetrized molecular dynamics
topic Nuclear Theory
Nuclear Experiment
url https://arxiv.org/abs/2602.19039