108 citations · 563 across the 22 of their papers we have counts for
19 papers · 1 filter
A dual description of quarks and baryons: Quarkyonic matter within a relativistic quark model
Tsuyoshi Miyatsu, Myung-Ki Cheoun, Koichi Saito
We investigate quarkyonic matter within a relativistic quark model by combining the dual quarkyonic picture with the quark-meson coupling (QMC) model. Using relativistic gaussian q…
Constraining the nuclear equation of state from terrestrial experiments and neutron star observations using relativistic mean-field models
Tsuyoshi Miyatsu, Myung-Ki Cheoun, Kyungsik Kim +1
We investigate the nuclear equation of state (EoS) for isospin-asymmetric matter using a new set of RMF interactions with the - and - mixing, referred to as the OMEG fa…
Quarkyonic Quark-Meson Coupling Model for Nuclear and Neutron Matter
Koichi Saito, Tsuyoshi Miyatsu, Myung-Ki Cheoun
We unite the dual quarkyonic model with the quark-meson coupling (QMC) model to construct a novel nuclear model based on the quark degrees of freedom, which can cover a wide range…
Equation of state for hyperonic neutron-star matter in SU(3) flavor symmetry
Tsuyoshi Miyatsu, Myung-Ki Cheoun, Kyungsik Kim +1
Using a relativistic mean-field model calibrated to finite-nucleus observables and bulk properties of dense nuclear matter, we investigate hyperonic neutron-star matter within an S…
Novel features of asymmetric nuclear matter from terrestrial experiments and astrophysical observations of neutron stars
Tsuyoshi Miyatsu, Myung-Ki Cheoun, Kyungsik Kim +1
The accurate measurement of neutron skin thickness of Pb by the PREX Collaboration suggests a large value of the nuclear symmetry energy slope parameter, , whereas the s…
Effects of neutron-rich nuclei masses on symmetry energy
Seonghyun Kim, Dukjae Jang, Soonchul Choi +2
We explore the impact of neutron-rich nuclei masses on the symmetry energy properties using the mass table evaluated by the deformed relativistic Hartree-Bogoliubov theory in conti…
Can the PREX-2 and CREX results be understood by relativistic mean-field models with the astrophysical constraints?
Tsuyoshi Miyatsu, Myung-Ki Cheoun, Kyungsik Kim +1
We construct new effective interactions using the relativistic mean-field models with the isoscalar- and isovector-meson mixing, and . Taking in…
Massive neutron stars with small radii in relativistic mean-field models optimized to nuclear ground states
Tsuyoshi Miyatsu, Myung-Ki Cheoun, Kyungsik Kim +1
We present an equation of state (EoS) for neutron stars using the relativistic mean-field model with isoscalar- and isovector-meson mixing. Taking into account the results of the n…
Asymmetric nuclear matter in relativistic mean-field models with isoscalar- and isovector-meson mixing
Tsuyoshi Miyatsu, Myung-Ki Cheoun, Koichi Saito
Using the relativistic mean-field model with nonlinear couplings between the isoscalar and isovector mesons, we study the properties of isospin-asymmetric nuclear matter. Not only…
Constraints on Nuclear Saturation Properties from Terrestrial Experiments and Astrophysical Observations of Neutron Stars
Soonchul Choi, Tsuyoshi Miyatsu, Myung-Ki Cheoun +1
Taking into account the terrestrial experiments and the recent astrophysical observations of neutron stars and gravitational-wave signals, we impose restrictions on the equation of…
Fock contributions to nuclear symmetry energy and its slope parameter based on Lorentz-covariant decomposition of nucleon self-energies
Tsuyoshi Miyatsu, Myung-Ki Cheoun, Chikako Ishizuka +3
Using relativistic Hartree-Fock (RHF) approximation, we study the effect of Fock terms on the nuclear properties not only around the saturation density, , but also at higher…
Equation of state for hybrid stars with strangeness
Tsuyoshi Miyatsu, Takahide Kambe, Koichi Saito
Considering the mass constraint from the resent pulsar observations, we study the properties of neutron stars including hyperons and quarks explicitly. Using the chiral quark-meson…
Equation of state for neutron stars with hyperons and quarks in relativistic Hartree-Fock approximation
Tsuyoshi Miyatsu, Myung-Ki Cheoun, Koichi Saito
We construct the equation of state (EoS) for neutron stars explicitly including hyperons and quarks. Using the quark-meson coupling model with relativistic Hartree-Fock approximati…
Equation of state for neutron stars: Hyperon mixing in SU(3) flavor symmetry
Tsuyoshi Miyatsu, Myung-Ki Cheoun, Koichi Saito
Using various kinds of relativistic mean-field models as well as the quark-meson coupling model, we study in detail the properties of neutron stars. We find that the equation of st…
Equation of state for neutron stars in SU(3) flavor symmetry
Tsuyoshi Miyatsu, Myung-Ki Cheoun, Koichi Saito
Using several relativistic mean field models (such as GM1, GM3, NL3, TM1, FSUGold and IU-FSU) as well as the quark-meson coupling model, we calculate the particle fractions, the eq…
Neutron Star Properties in the Chiral Quark-Meson Coupling Model
Tsuyoshi Miyatsu, Koichi Saito
We study the properties of neutron star using the chiral quark-meson coupling model, in which the quark-quark hyperfine interaction due to the exchanges of gluon and pion based on…
Effects of Fock term, tensor coupling and baryon structure variation on a neutron star
Tsuyoshi Miyatsu, Tetsuya Katayama, Koichi Saito
The equation of state for neutron matter is calculated within relativistic Hartree-Fock approximation. The tensor couplings of vector mesons to baryons are included, and the change…
Hyperons in nuclear matter
T. Miyatsu, K. Saito
The chiral version of the QMC model, in which the effect of gluon and pion exchanges is included self-consistently, is applied to the hyperons in a nuclear medium. The hyperfine in…
Quark-meson coupling model with the cloudy bag
S. Nagai, T. Miyatsu, K. Saito +1
Using the volume coupling version of the cloudy bag model, the quark-meson coupling model is extended to study the role of pion field and the properties of nuclear matter. The exte…