35 citations · 381 across the 38 of their papers we have counts for
39 papers
Charge symmetry breaking effects of - mixing in relativistic mean-field model
Yusuke Tanimura, Tomoya Naito, Hiroyuki Sagawa +1
We present a relativistic mean-field model that incorporates charge symmetry breaking (CSB) of nuclear force via - meson mixing, along with corrections to the electromag…
Quartet correlations near the surface of nuclei
Yixin Guo, Tomoya Naito, Hiroyuki Tajima +1
We theoretically investigate Cooper quartet correlations in doubly-magic nuclei (, , and ). We firs…
Mirror-skin thickness: a possible observable sensitive to the charge symmetry breaking energy density functional
Tomoya Naito, Yuto Hijikata, Juzo Zenihiro +2
We propose a new observable, named the mirror-skin thickness, in order to extract the strength of the charge symmetry breaking (CSB) term in an energy density functional (EDF). The…
QCD sum rule approach to Okamoto-Nolen-Schiffer anomaly
Hiroyuki Sagawa, Tomoya Naito, Xavier Roca-Maza +1
A new framework is introduced to connect between a charge symmetry breaking (CSB) energy density functional (EDF) and the low-energy constants derived from quantum chromodynamics (…
A deep neural network approach to solve the Dirac equation
Chuanxin Wang, Tomoya Naito, Jian Li +1
We extend the method from [Naito, Naito, and Hashimoto, Phys. Rev. Research 5, 033189 (2023)] to solve the Dirac equation not only for the ground state but also for low-lying excit…
A neural network approach for two-body systems with spin and isospin degrees of freedom
Chuanxin Wang, Tomoya Naito, Jian Li +1
We propose an enhanced machine learning method to calculate the ground state of two-body systems. By extending the original method [Naito, Naito, and Hashimoto, Phys. Rev. Research…
Possible inconsistency between phenomenological and theoretical determinations of charge symmetry breaking in nuclear energy density functionals
Tomoya Naito, Gianluca Colò, Tetsuo Hatsuda +3
We summarize the recent progress on the determination of the charge symmetry breaking term of nuclear energy density functionals. We point out that the strength of the term determi…
Neural Polytopes
Koji Hashimoto, Tomoya Naito, Hisashi Naito
We find that simple neural networks with ReLU activation generate polytopes as an approximation of a unit sphere in various dimensions. The species of polytopes are regulated by th…
Revisiting the extraction of charge radii of Ca and Pb with muonic atom spectroscopy
Hui Hui Xie, Tomoya Naito, Jian Li +1
The extractions of nuclear charge radii from muonic atom spectroscopy for Ca and Pb are revisited to analyze the model dependencies induced by employing a Fermi-type…
QCD-based charge symmetry breaking interaction and the Okamoto-Nolen-Schiffer anomaly
Hiroyuki Sagawa, Tomoya Naito, Xavier Roca-Maza +1
An approach is proposed to link the charge symmetry breaking (CSB) nuclear interaction and the low-energy constants in quantum chromodynamics (QCD) by matching the CSB effect in nu…
Empirical neutron star mass formula based on experimental observables
Hajime Sotani, Tomoya Naito
We derive the empirical formulae expressing the mass and gravitational redshift of a neutron star, whose central density is less than threefold the nuclear saturation density, as a…
Multi-body wave function of ground and low-lying excited states using unornamented deep neural networks
Tomoya Naito, Hisashi Naito, Koji Hashimoto
We propose a method to calculate wave functions and energies not only of the ground state but also of low-lying excited states using a deep neural network and the unsupervised mach…
Effects of Coulomb and isospin symmetry breaking interactions on neutron-skin thickness
Tomoya Naito, Gianluca Colò, Haozhao Liang +2
Both the Coulomb interaction and isospin symmetry breaking (ISB) parts of the nuclear interaction break the isospin symmetry in atomic nuclei. Effects of these two kinds of interac…
Comparative study on charge radii and their kinks at magic numbers
Tomoya Naito, Tomohiro Oishi, Hiroyuki Sagawa +1
Isotope dependences of charge radii, i.e., isotope shifts, calculated by the Skyrme Hartree-Fock, the relativistic mean-field, and the relativistic Hartree-Fock calculations are co…
Nuclear Many-Body Effect on Particle Emissions Following Muon Capture on Si and Ca
Futoshi Minato, Tomoya Naito, Osamu Iwamoto
Muon captures on nuclei have provided us with plenty of knowledge of nuclear properties. Recently, this reaction attracts attention in electronics, because it is argued that charge…
Calibration of nuclear charge density distribution by back-propagation neural networks
Zu-Xing Yang, Xiao-Hua Fan, Tomoya Naito +3
Based on the back-propagation neural networks and density functional theory, a supervised learning is performed firstly to generate the nuclear charge density distributions. The ch…
New constraints on the neutron-star mass and radius relation from terrestrial nuclear experiments
Hajime Sotani, Nobuya Nishimura, Tomoya Naito
The determination of the equation of state (EOS) for nuclear matter has been one of the biggest problems in nuclear astrophysics, because the EOS is essential for determining the p…
Isospin symmetry breaking in the charge radius difference of mirror nuclei
Tomoya Naito, Xavier Roca-Maza, Gianluca Colò +2
Isospin symmetry breaking (ISB) effects in the charge radius difference of mirror nuclei are studied using the test example of Ca and Ni. This choic…
Persistence of cluster structure in the ground state of B
Naoyuki Itagaki, Tomoya Naito, Yuichi Hirata
The persistence of cluster configuration in the ground state of B is discussed. The particles emitted from excited states of C could be utilized for cance…
Construction of energy density functional for arbitrary spin polarization using functional renormalization group
Takeru Yokota, Tomoya Naito
We show an application of the functional-renormalization-group aided density functional theory to the homogeneous electron gas with arbitrary spin polarization, which gives the ene…
Toward ab initio charge symmetry breaking in nuclear energy density functionals
Tomoya Naito, Gianluca Colò, Haozhao Liang +2
We propose a new approach to determine the strength of the charge symmetry breaking (CSB) term in the framework of nuclear density functional theory. It is shown that once ab initi…
Relativistic correction of the Coulomb interaction in the local density approximation for energies and radii in doubly-magic nuclei
Tomoya Naito
Effects of the relativistic correction of the Coulomb interaction on doubly-magic nuclei are discussed with Skyrme Hartree--Fock calculations. The relativistic correction is treate…
Nuclear energy density functionals from empirical ground-state densities
Giacomo Accorto, Tomoya Naito, Haozhao Liang +2
A model is developed, based on the density functional perturbation theory and the inverse Kohn-Sham method, that can be used to improve relativistic nuclear energy density function…
Second and fourth moments of the charge density and neutron-skin thickness of atomic nuclei
Tomoya Naito, Gianluca Colò, Haozhao Liang +1
A method is presented to extract the neutron-skin thickness of atomic nuclei from the second and fourth moments of the electric charge distribution. We show that the value of the p…