Abstract
Using an extended parity doublet model with the hidden local symmetry, we study some properties of nuclei in the mean field approximation to see if the parity doublet model could reproduce nuclear properties and also to estimate the value of the chiral invariant nucleon mass \(m_0\) preferred by nuclear structure. We first determine our model parameters using the inputs from free space and from nuclear matter properties. Then, we study some basic nuclear properties such as the nuclear binding energy with several different choices of the chiral invariant mass. We observe that our results approach the experimental values as \(m_0\) is increased until \(m_0=700\) MeV and start to deviate more from the experiments afterwards with \(m_0\) larger than \(m_0=700\) MeV. From this observation, we conclude that \(m_0=700\) MeV is preferred by nuclear properties. We then calculate some properties of several selected nuclei with \(m_0=700\) MeV and compare them with experiments. Finally, we study the neutron-proton mass difference in some nuclei.
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This manuscript has no associated data or the data will not be deposited. [Authors’ comment: The relevant data to show are all shown in the main text].
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Acknowledgements
We thank Jie Meng for providing the RCHB code. This work was supported in part by the Rare Isotope Science Project of Institute for Basic Science funded by Ministry of Science and ICT and National Research Foundation of Korea (2013M7A1A1075764), by the Institute for Basic Science (IBS-R031-D1), by National Research Foundation of Korea (NRF) grants funded by the Korean government (Ministry of Science and ICT) (No. 2021R1F1A1060066, No.2020R1A2C3006177), and by JPSP KAKENHI Grant Number 20K03927.
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Communicated by Dario Vretenar
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Mun, MH., Shin, I.J., Paeng, WG. et al. Nuclear structure in parity doublet model. Eur. Phys. J. A 59, 149 (2023). https://doi.org/10.1140/epja/s10050-023-01064-x
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DOI: https://doi.org/10.1140/epja/s10050-023-01064-x