Isospin symmetry breaking in nuclear energy density functional towards accurate determination of nuclear equation of state
Room 327
Science Hall
Isospin symmetry breaking in nuclear energy density functional towards accurate determination of nuclear equation of state
Speaker: Tomoya Naito (The University of Tokyo, Japan)
Date: 2026. 05. 12. (Tue) 17:00
Venue: Science Hall #327
The isospin symmetry breaking part of the nuclear interaction is a small part of the whole;
however, it sometimes gives important contributions to nuclear properties, such as the difference
of mirror nuclei, the isobaric analog states, and the neutron-skin thickness. The isospin
symmetry breaking terms also affect the estimation of the slope parameter of the nuclear
symmetry energy non-negligiblly [1]. This effect is also indispensable to describe exotic nuclei,
while it depends on the in-medium strength of the isospin symmetry breaking. Recently, we
found that the in-medium strength determined phenomenologically is about one order of
magnitude stronger than the ab initio determination [2].
In this talk, I will summarize our recent study on the isospin symmetry breaking in nuclear
properties [1, 3] and introduce our recent attempt to determine the energy density functional of
the isospin symmetry breaking terms based on QCD sum rule [4] and radii [5]. I will also
discuss the isospin symmetry breaking in the relativistic mean-field theory [6].
[1] T. Naito, G. Colò, H. Liang, X. Roca-Maza, and H. Sagawa. Phys. Rev. C 107, 064302 (2023)
[2] T. Naito, G. Colò, T. Hatsuda, H. Liang, X. Roca-Maza, and H. Sagawa. Nuovo Cim. C 47, 52 (2024)
[3] T. Naito, X. Roca-Maza, G. Colò, H. Liang, and H. Sagawa. Phys. Rev. C 106, L061306 (2022)
[4] H. Sagawa, T. Naito, X. Roca-Maza, and T. Hatsuda. Phys. Rev. C 109, L011302 (2024)
[5] T. Naito, Y. Hijikata, J. Zenihiro, G. Colò, and H. Sagawa. Eur. Phys. J. A 61, 177 (2025)
[6] Y. Tanimura, T. Naito, H. Sagawa, and M.-K. Cheoun. Eur. Phys. J. A 61, 229 (2025)
