Publications (129)
Dual Ginzburg-Landau Theory and Chiral Symmetry Breaking
H. Toki, S. Sasaki, H. Suganuma
We study the properties of quarks, being confined in hadrons, with the Schwinger-Dyson equation in the dual Ginzburg-Landau Theory. Magnetic monopole condensation, which provides q…
SU(3) Chiral approach to meson and baryon dynamics
E. Oset, A. Hosaka, J. C. Nacher +6
We report on recent progress on the chiral unitary approach, which is shown to have a much larger convergence radius than ordinary chiral perturbation theory, allowing one to repro…
The stability and the shape of the heaviest nuclei
L. S. Geng, H. Toki, E. G. Zhao
In this paper, we report a systematic study of the heaviest nuclei within the relativistic mean field (RMF) model. By comparing our results with those of the Hartree-Fock-Bogoliubo…
Reply to the comment on I=4 bifurcation in ground rotational bands of even-even nuclei and the interacting boson model
H. Toki, L. A. Wu
This is the reply to the comment of Kuyucak and Stuchbery on our paper published in Phys. Rev. Lett. 79 (1997) 2006.
Chiral SU(3) Bethe Salpeter Model: Extension to SU(6) and SU(8) Spin-Flavor Symmetries
J. Nieves, C. Garcia-Recio, L. L. Salcedo +4
Consistent SU(6) and SU(8) spin-flavor extensions of the SU(3) flavor Weinberg-Tomozawa (WT) meson-baryon chiral Lagrangian are constructed, which incorporate vector meson degrees…
Properties of Color-Coulomb String Tension
Y. Nakagawa, A. Nakamura, T. Saito +2
We study the properties of the color-Coulomb string tension obtained from the instantaneous part of gluon propagators in Coulomb gauge using quenched SU(3) lattice simulation. In t…
Relativistic Hartree-Bogoliubov Approach for Nuclear Matter with Non-Linear Coupling Terms
S. Sugimoto, K. Sumiyoshi, H. Toki
We investigate the pairing property of nuclear matter with Relativistic Hartree-Bogoliubov(RHB) approach. Recently, the RHB approach has been widely applied to nuclear matter and f…
Photoproduction of meson and baryon resonances in a chiral unitary approach
E. Oset, E. Marco, J. C. Nacher +4
By means of a coupled channel non-perturbative unitary approach, it is possible to extend the strong constrains of Chiral Perturbation Theory to higher energies. In particular, it…
Recent developments in chiral dynamics of hadrons and hadrons in a nuclear medium
E. Oset, S. Sarkar, M. J. Vicente Vacas +5
In this talk I present recent developments in chiral dynamics of hadrons and hadrons in a medium addressing the following points: interaction of the octet of pseudoscalar mesons wi…
Test of phi renormalization in nuclei through phi photoproduction
E. Oset, M. J. Vicente Vacas, H. Toki +1
We propose an experimental procedure to find out the medium modifications of the meson. The reaction is inclusive photoproduction in nuclei, looking for pairs f…
Chromomagnetic Catalysis of Color Superconductivity in a (2+1)-dimensional NJL Model
D. Ebert, K. G. Klimenko, H. Toki
The influence of a constant uniform external chromomagnetic field on the formation of color superconductivity has been investigated. The consideration was performed in the fram…
Relativistic Equation of State of Nuclear Matter for Supernova Explosion
H. Shen, H. Toki, K. Oyamatsu +1
We construct the equation of state (EOS) of nuclear matter at finite temperature and density with various proton fractions within the relativistic mean field (RMF) theory for the u…
Photoproduction of the Lambda(1405) on the proton and nuclei
J. C. Nacher, E. Oset, H. Toki +1
We study the gamma p ---> K^+ Lambda(1405) reaction at energies close to threshold using a chiral unitary model where the resonance is generated dynamically from K^-p interaction w…
Variation of hadron masses in nuclear matter in the relativistic Hartree approximation
H. Shen, S. Tamenaga, H. Toki
We study the modification of hadron masses due to the vacuum polarization using the chiral sigma model, which is extended to generate the meson mass by the sigma condensation…
A theoretical view on bound antikaon-nuclear states
A. Ramos, V. K. Magas, E. Oset +1
We present an overview of the latest theoretical studies on the antikaon properties in the nuclear medium, in connection with the recent experimental claims of very deeply bound an…
A critical analysis on deeply bound kaonic states in nuclei and the KEK experiment
E. Oset, H. Toki
We critically discuss the theoretical developments that led to predictions of very deeply bound kaon states and then revise the data of the KEK experiment from where claims for evi…
Self-consistent relativistic random phase approximation with vacuum polarization
A. Haga, H. Toki, S. Tamenaga +2
We present a theoretical formulation for the description of nuclear excitations within the framework of relativistic random-phase approximation whereby the vacuum polarization aris…
Dual Ginzburg-Landau Theory for Nonperturbative QCD
H. Suganuma, H. Ichie, S. Sasaki +1
Nonperturbative QCD is studied with the dual Ginzburg-Landau theory, where color confinement is realized through the dual Higgs mechanism by QCD-monopole condensation. We obtain a…
Recent progress on the chiral unitary approach to meson meson and meson baryon interactions
E. Oset, J. A. Oller, J. R. Pelaez +11
We report on recent progress on the chiral unitary approach, analogous to the effective range expansion in Quantum Mechanics, which is shown to have a much larger convergence radiu…
Neutron pick-up pion transfer reactions for the formation of deeply bound pionic atoms in Pb
S. Hirenzaki, H. Toki
We study and (d,He) reactions on leading to deeply bound pionic atoms with one neutron hole being left. We develop a theoretical model to calculate cross sec…
Critical review of deeply bound kaonic nuclear states
V. K. Magas, E. Oset, A. Ramos +1
We critically revise the recent claims of narrow deeply bound kaonic states and show that at present there is no convincing experimental evidence for their existence. In particular…
Analyzing powers in inclusive pion production at high energy and the nucleon spin structure
Katuhiko Suzuki, Noriaki Nakajima, H. Toki +1
Analyzing powers in inclusive pion production in high energy transversely polarized proton-proton collisions are studied theoretically in the framework of the quark recombination m…
Axial Currents of Virtual Charm in Light Quark Processes
F. Araki, M. Musakhanov, H. Toki
The systematic investigations of the role of the virtual charm axial currents in the decay of -mesons to and the spin structure of the nucleon are performed. We reduce…
Radiative production of the Lambda(1405) resonance in K collisions on protons and nuclei
J. C. Nacher, E. Oset, H. Toki +1
We have carried a theoretical study of the K^- p\to M B γreaction with M B = K^-p, \bar{K}^0 n, Ï^- Σ^+, Ï^+ Σ^-, Ï^0 Σ^0, Ï^0 Î, for K^- lab. momenta between 200 and 500…
Coulomb-gauge ghost and gluon propagators in SU(3) lattice Yang-Mills theory
Y. Nakagawa, A. Voigt, E. -M. Ilgenfritz +5
We study the momentum dependence of the ghost propagator and of the space and time components of the gluon propagator at equal time in pure SU(3) lattice Coulomb gauge theory carry…
Casimir scaling in a dual superconducting scenario of confinement
Y. Koma, E. -M. Ilgenfritz, H. Toki +1
The string tensions of flux tubes associated with static charges in various SU(3) representations are studied within the dual Ginzburg-Landau (DGL) theory. The ratios of the string…
A critical view on the deeply bound K^- pp system
V. K. Magas, E. Oset, A. Ramos +1
We briefly review the situation around the claimed deeply bound K^- states in different recent experiments and concentrate particularly on the state K^- pp advocated by the FINUDA…
Weyl symmetric representation of hadronic flux tubes in the dual Ginzburg-Landau theory
Y. Koma, E. -M. Ilgenfritz, T. Suzuki +1
Hadronic flux-tube solutions describing the mesonic and the baryonic states within the dual Ginzburg-Landau (DGL) theory are investigated by using the dual lattice formulation in t…
On the Role of Charm in Decay of B-mesons to η' K
F. Araki, M. Musakhanov, H. Toki
In this letter we focus on the calculation of the amplitude of the transition, which provides the magnitude of the contributi…
The volume dependence of the long-range two-body potentials in various color channels by lattice QCD
Y. Nakagawa, A. Nakamura, T. Saito +1
We study the color-dependent confining forces between two quarks by the quenched lattice simulations of Coulomb gauge QCD. The color-singlet and color-antitriplet instantaneous pot…
Correlation between Confinement and Chiral-Symmetry Breaking in the Dual Higgs Theory
S. Umisedo, H. Suganuma, H. Toki
We study the correlation between confinement and dynamical chiral-symmetry breaking (DSB) in the dual Ginzburg-Landau (DGL) theory using the effective potential formalism. The…
Constituent quark model for baryons with strong quark-pair correlations and non-leptonic weak transitions of hyperon
K. Suzuki, E. Hiyama, H. Toki +1
We study the roles of quark-pair correlations for baryon properties, in particular on non-leptonic weak decay of hyperons. We construct the quark wave function of baryons by solvin…
Properties of the QCD vacuum in the dual Ginzburg-Landau theory
S. Umisedo, H. Toki, H. Suganuma
We study the properties of the QCD vacuum in the dual Ginzburg-Landau theory, where QCD-monopole condensation leads to the linear confinement potential. Using the effective potenti…
Mass dependence of inclusive nuclear photoproduction
D. Cabrera, L. Roca, E. Oset +2
Based on a prior determination of the selfenergy in a nuclear medium we perform a theoretical study of inclusive photoproduction in nuclei, looking at the dependence…
Collective excitations and energy-weighted sum rules in relativistic random phase approximation with vacuum polarization
A. Haga, H. Toki, S. Tamenaga +1
The isoscalar and isovector collective multipole excitations in stable nuclei are studied in the framework of relativistic random-phase approximation with the vacuum polarization a…
Study of two-proton radioactivity within the relativstic mean-field plus bcs approach
D. Singh, G. Saxena, M. Kaushik +2
Encouraged by the success of RMF+BCS approach for the description of the ground state properties of the chains of isotopes of proton magic nuclei with proton number \textit{Z}=8, 2…
Pairing correlations and resonant states in the relativistic mean field theory
N. Sandulescu, L. S. Geng, H. Toki +1
We present a simple scheme for taking into account the resonant continuum coupling in the Relativistic Mean Field- BCS (RMF-BCS) calculations. In this scheme, applied before in non…
Properties of a relativistic equation of state for collapse-driven supernovae
K. Sumiyoshi, H. Suzuki, S. Yamada +1
We study characteristics of the relativistic equation of state (EOS) for collapse-driven supernovae, which is derived by relativistic nuclear many body theory. Recently the relativ…
Correlation between Instantons and QCD-monopoles in the Abelian Gauge
H. Suganuma, K. Itakura, H. Toki +1
The correlation between instantons and QCD-monopoles is studied both in the lattice gauge theory and in the continuum theory. From a simple topological consideration, instantons ar…
Chromomagnetic Catalysis of Color Superconductivity and Dimensional Reduction
D. Ebert, K. G. Klimenko, H. Toki +1
We consider diquark condensation in external chromomagnetic fields at non--zero temperature. The general features of this process are investigated for various field configurations…
QCD Phase Transition and Hadron Bubble Formation in the Dual Ginzburg-Landau Theory
H. Ichie, H. Monden, H. Suganuma +1
We study the QCD phase transition at finite temperature and discuss the hadron bubble formation in the dual Ginzburg-Landau theory, which is an effective theory of QCD and describe…
Hybrid C-O-Ne white dwarfs as progenitors of type Ia supernovae: dependence on Urca process and mixing assumptions
P. Denissenkov, J. W. Truran, F. Herwig +5
When carbon is ignited off-centre in a CO core of a super-AGB star, its burning in a convective shell tends to propagate to the centre. Whether the C flame will actually be able to…
Observation of Tensor-Driven High-Momentum Neutrons in O via () Reactions and Zero-Degree Deuteron Momentum Spectroscopy
X. Wang, H. J. Ong, S. Terashima +42
The reaction has been studied at using 403-, 604-, 907- and 1209-MeV protons, comparing cross sections populating positive- and ne…
Abelian Monopole and Center Vortex Views at the Multi-Instanton Gas
M. Fukushima, E. -M. Ilgenfritz, H. Toki
We consider full non-Abelian, Abelian and center projected lattice field configurations built up from random instanton gas configurations in the continuum. We study the instanton c…
Role of quark-quark correlation in baryon structure and non-leptonic weak transitions of hyperons
E. Hiyama, K. Suzuki, H. Toki +1
We study the role of quark-quark correlation in the baryon structure and, in particular, the hyperon non-leptonic weak decay, which is sensitive to the correlation between quarks i…
Chiral Unitary Approach to the Kaon Nucleus Interaction and Kaonic Atoms
E. Oset, S. Hirenzaki, Y. Okumura +3
We review recent work on various topics related to the modification of kaon properties in nuclei. After a brief exposition of the kaon-nucleon and kaon-nucleus interaction, results…
Relativistic Continuum Hartree Bogoliubov Theory for Ground State Properties of Exotic Nuclei
J. Meng, H. Toki, S. G. Zhou +3
The Relativistic Continuum Hartree-Bogoliubov (RCHB) theory, which properly takes into account the pairing correlation and the coupling to (discretized) continuum via Bogoliubov tr…
Testing the nature of the resonance through photoproduction
L. Roca, E. Oset, H. Toki
Recent studies within the framework of chiral unitary theory produce the resonance, among several others, as a dynamically generated resonance from the interaction of th…
Pentaquark in nuclear matter and hypernuclei
H. Shen, H. Toki
We study the properties of the in nuclear matter and hypernuclei within the quark mean-field (QMF) model, which has been successfully used for the description of ordi…
Effect of negative energy components for two-nucleon systems in the relativistic framework with the separable ansatz
Y. Manabe, A. Hosaka, H. Toki
We investigate the electromagnetic properties of the deuteron such as the charge and magnetic form factors by solving the Bethe-Salpeter equation (BSE) with the separable ansatz. I…
A systematic study of Zr and Sn isotopes in the Relativistic Mean Field theory
L. S. Geng, H. Toki, J. Meng
The ground-state properties of Zr and Sn isotopes are studied within the relativistic mean field theory. Zr and Sn isotopes have received tremendous attention due to various reason…
Description of Drip-Line Nuclei within Relativistic Mean-Field Plus BCS Approach
H. L. Yadav, M. Kaushik, H. Toki
Recently it has been demonstrated, considering Ni and Ca isotopes as prototypes, that the relativistic mean-field plus BCS (RMF+BCS) approach wherein the single particle continuum…
Monopole Dominance for Dynamical Chiral-Symmetry Breaking in the Dual Ginzburg-Landau Theory
S. Umisedo, S. Sasaki, H. Suganuma +1
Using the effective potential formalism, we study dynamical chiral symmetry breaking (DSB) in the dual Ginzburg-Landau (DGL) theory, where the color confinement is brought by m…
Study of Neutron Magic Drip-Line Nuclei within Relativistic Mean Field plus BCS Approach
G. Saxena, D. Singh, M. Kaushik +2
Encouraged by the success of RMF+BCS approach for the description of the ground state properties of the chains of isotopes of proton magic nuclei with proton number Z=8, 20, 28, 50…
Study of hypernuclei in the quark mean field model
H. Shen, H. Toki
We extend the quark mean field model to the study of hypernuclei. Without adjusting parameters, the properties of hypernuclei can be described reasonably well. The small…
Exchange in the NN Interaction within the Chiral Unitary Approach
E. Oset, H. Toki, M. Mizobe +1
We study the nucleon-nucleon interaction in the isoscalar-scalar channel using t he chiral unitary approach. The -matrix of the pion-pion scattering in this c hannel is summed u…
Path-integral hadronization for the nucleon and its interactions
L. J. Abu-Raddad, A. Hosaka, D. Ebert +1
Nucleon structure and the origin and nature of the nuclear force are investigated in the context of a QCD-based effective field theory and the path-integral method of hadronization…
Pion Structure Function in the Nambu and Jona-Lasinio model
T. Shigetani, K. Suzuki, H. Toki
The pion structure function is studied in the Nambu and Jona-Lasinio (NJL) model. We calculate the forward scattering amplitude of a virtual photon from a pion target in the Bjorke…
Quark mass dependence of the ground-state octet baryons in next-to-next-to-next-to-leading order covariant baryon chiral perturbation theory
X. -L. Ren, L. S. Geng, J. Martin Camalich +2
We report on a recent study of the ground-state octet baryon masses using the covariant baryon chiral perturbation theory with the extended-on-mass-shell renormalization scheme up…
Double- hypernuclei in the relativistic mean-field theory
H. Shen, F. Yang, H. Toki
We study the properties of double- hypernuclei in the relativistic mean-field theory, which has been successfully used for the description of stable and unstable nuclei. With t…
Topological structure of chiral QCD vacuum
V. Gogohia, H. Toki
Using the trace anomaly relation, low-energy theorem and Witten-Veneziano formula, we have developed an analytical formalism which allows one to calculate the gluon condensate, the…
Color superconductivity at finite density and temperature with flavor asymmetry
O. Kiriyama, S. Yasui, H. Toki
Color superconductivity of QCD at finite density, temperature and flavor asymmetry is studied within an approximation which the interaction is modeled upon four--fermion interactio…
Effects of quark matter and color superconductivity in compact stars
D. Blaschke, H. Grigorian, D. N. Aguilera +2
The equation of state for quark matter is derived for a nonlocal, chiral quark model within the mean field approximation. We investigate the effects of a variation of the form fact…
Proton and neutron skins of light nuclei within the Relativistic Mean Field theory
L. S. Geng, H. Toki, A. Ozawa +1
The Relativistic Mean Field (RMF) theory is applied to the analysis of ground-state properties of Ne, Na, Cl and Ar isotopes. In particular, we study the recently established proto…
Separable Kernel of Nucleon-Nucleon Interaction in the Bethe-Salpeter Approach for J=0,1
S. G. Bondarenko, V. V. Burov, N. Hamamoto +3
The solution for the nucleon-nucleon T matrix in the framework of the covariant Bethe-Salpeter approach for a two spin-one-half particle system with a separable kernel of interacti…
Chiral unitary theory: application to nuclear problems
E. Oset, D. Cabrera, H. C. Chiang +8
In this talk we briefly describe some basic elements of chiral perturbation theory, , and how the implementation of unitarity and other novel elements lead to a better expans…
Meson Structure in Deep Inelastic Scattering
T. Shigetani, K. Suzuki, H. Toki
We study the deep inelastic structure functions of mesons within the Nambu and Jona-Lasinio model. We calculate the valence quark distributions in , , and mesons at th…
Relativistic Equation of State for Core-Collapse Supernova Simulations
H. Shen, H. Toki, K. Oyamatsu +1
We construct the equation of state (EOS) of dense matter covering a wide range of temperature, proton fraction, and density for the use of core-collapse supernova simulations. The…
Systematic Study of Triaxial Deformation in the Relativistic Mean Field Theory
S. Sugimoto, K. Sumiyoshi, D. Hirata +3
We use the relativistic mean field (RMF) theory to systematically study the change of deformation of even-even nuclei in the proton-rich Xe region. We investigate the appearance of…
Quark Confinement Physics in Quantum Chromodynamics
Y. Koma, H. Suganuma, K. Amemiya +2
We study abelian dominance and monopole condensation for the quark confinement physics using the lattice QCD simulations in the MA gauge. These phenomena are closely related to the…
Formation of Deeply Bound 1s Pionic States in the Pb(d,He) Reaction
S. Hirenzaki, H. Toki
Recently, deeply bound pionic states were found experimentally in (d,He) reactions on Pb. The observed spectrum showed an excellent agreement with the DWIA calculation…
Further considerations concerning claims for deeply bound kaon atoms and reply to criticisms
E. Oset, V. K. Magas, A. Ramos +1
We briefly review the experiments of KEK and FINUDA, that claim evidence for deeply bound kaon states, from the perspective of recent theoretical papers and experiments that provid…
Chiral symmetry in electromagnetically induced resonant two hadron production
E. Oset, A. Ramos, E. Marco +2
We report on recent progress on the chiral unitary approach, analogous to the effective range expansion in Quantum Mechanics, which is shown to have a much larger convergence radiu…
Is there window for "supersoft" Pomeron in photoproduction at low energy?
D. Roy, T. Morii, H. Toki +1
The low energy photoproduction cross-section has been studied on the basis of the Pomeron model. To incorporate the discrepancy between experimental data and the predictionn…
Rare radiative B decays to orbitally excited K mesons
D. Ebert, R. N. Faustov, V. O. Galkin +1
The exclusive rare radiative B meson decays to orbitally excited axial-vector mesons K_1^*(1270), K_1(1400) and to the tensor meson K_2^*(1430) are investigated in the framework of…
Diquark Corrleations in the nucleon structure function
K. Suzuki, T. Shigetani, H. Toki
The nucleon structure functions are studied with a special emphasis on diquark correlations inside the nucleon. Assuming a phenomenological diquark-quark model of the nucleon at th…
Masses, Deformations and Charge Radii--Nuclear Ground-State Properties in the Relativistic Mean Field Model
L. S. Geng, H. Toki, J. Meng
We perform a systematic study of the ground-state properties of all the nuclei from the proton drip line to the neutron drip line throughout the periodic table employing the relati…
Five-body calculation of resonance and scattering states of pentaquark system
E. Hiyama, M. Kamimura, A. Hosaka +2
Scattering problem of the system, in the standard non-relativistic quark model of Isgur-Karl, is solved for the first time, by treating the large five-body modelspac…
Dynamical structure of the chiral QCD vacuum in the zero modes enhancement quantum model
V. Gogohia, H. Toki, T. Sakai +1
Using the effective potential approach for composite operators we have formulated the quantum model of the QCD vacuum. It is based on the existence and importance of the nonperturb…
The phi --> pi^+ pi^- and phi radiative decays within a chiral unitary approach
E. Oset, S. Hirenzaki, E. Marco +3
We report on recent results on the decay of the phi into pi^+ pi^- and phi radiative decays into pi^0 pi^0 gamma and pi^0 eta gamma, which require the consideration of the final st…
Photoproduction of scalar mesons on protons and nuclei
E. Marco, E. Oset, H. Toki
We study the photoproduction of scalar mesons close to the threshold of f_0(980) and a_0(980) using a unitary chiral model. Peaks for both resonances show up in the invariant mass…
Study of Proton Magic Even-Even Isotopes and Giant Halos of Ca Isotopes with Relativistic Continuum Hartree-Bogoliubov Theory
S. Q. Zhang, J. Meng, H. Toki +2
We study the proton magic O, Ca, Ni, Zr, Sn, and Pb isotope chains from the proton drip line to the neutron drip line with the relativistic continuum Hartree-Bogoliubov (RCHB) theo…
IR suppression of the Coulomb gauge gluon propagator in SU(3) Yang-Mills theory
Y. Nakagawa, A. Nakamura, T. Saito +1
We calculate the equal-time transverse gluon propagator in Coulomb gauge QCD using a SU(3) quenched lattice gauge simulation on large lattices, up to 11 [fm]. We find that the…
Octet baryon masses in next-to-next-to-next-to-leading order covariant baryon chiral perturbation theory
X. -L. Ren, L. S. Geng, J. Martin Camalich +2
We study the ground-state octet baryon masses and sigma terms using the covariant baryon chiral perturbation theory (ChPT) with the extended-on-mass-shell (EOMS) renormalization sc…
Influence of the symmetry energy on the birth of neutron stars and supernova neutrinos
K. Sumiyoshi, H. Suzuki, H. Toki
We study the influence of the symmetry energy of the equation of state on the thermal evolution of protoneutron stars and the properties of supernova neutrinos by the numerical sim…
Chiral symmetry breaking and stability of strangelets
S. Yasui, A. Hosaka, H. Toki
We discuss the stability of strangelets by considering dynamical chiral symmetry breaking and confinement. We use a symmetric Nambu--Jona-Lasinio model f…
Possible evidence of tensor interactions in 16O observed via (p,d) reaction
H. J. Ong, I. Tanihata, A. Tamii +25
We have measured 16O(p,d) reaction using 198-, 295- and 392-MeV proton beams to search for a direct evidence on the effect of the tensor interactions in light nucleus. Differential…
Spectral sum for the color-Coulomb potential in SU(3) Coulomb gauge lattice Yang-Mills theory
Y. Nakagawa, A. Nakamura, T. Saito +1
We discuss the essential role of the low-lying eigenmodes of the Faddeev-Popov (FP) ghost operator on the confining color-Coulomb potential using SU(3) quenched lattice simulations…
Extended quark mean-field model for neutron stars
J. N. Hu, A. Li, H. Toki +1
We extend the quark mean-field (QMF) model to strangeness freedom to study the properties of hyperons () in infinite baryon matter and neutron star properties. The baryon…
The System of Multi Color-flux-tubes in the Dual Ginzburg-Landau Theory
H. Ichie, H. Suganuma, H. Toki
We study the system of multi color-flux-tubes in terms of the dual Ginzburg -Landau theory. We consider two ideal cases, where the directions of all the color-flux-tubes are the sa…
Correlations and the relativistic structure of the nucleon self-energy
H. Müther, S. Ulrych, H. Toki
A key point of Dirac Brueckner Hartree Fock calculations for nuclear matter is to decompose the self energy of the nucleons into Lorentz scalar and vector components. A new method…
Understanding Magic Numbers in Neutron-Rich Nuclei by Tensor Blocking Mechanism
I. Tanihata, H. Toki, S. Terashima +1
A new paradigm for nuclear structure that includes blocking effects of tensor interactions is proposed. All of the recently discovered magic numbers (N=6, 14, 16, 32 and 34) in neu…
Infrared behavior of the Faddeev-Popov operator in Coulomb gauge QCD
Y. Nakagawa, A. Nakamura, T. Saito +1
We calculate the eigenvalue distribution of the Faddeev-Popov operator in Coulomb gauge QCD using quenched SU(3) lattice simulation. In the confinement phase, the density of the lo…
An isotopic effect in phi photoproduction at a few GeV
A. I. Titov, T. -S. H. Lee, H. Toki
A distinct isotopic effect in phi photoproduction at 2-5 GeV region is identified by examining the production amplitudes due to Pomeron-exchange and meson-exchange mechanisms. This…
Postbounce evolution of core-collapse supernovae: Long-term effects of equation of state
K. Sumiyoshi, S. Yamada, H. Suzuki +3
We study the evolution of supernova core from the beginning of gravitational collapse of a 15Msolar star up to 1 second after core bounce. We present results of spherically symmetr…
Relativistic mean field theory for deformed nuclei with pairing correlations
L. S. Geng, H. Toki, S. Sugimoto +1
We develop a relativistic mean field (RMF) description of deformed nuclei with the pairing correlations in the BCS approximation. The treatment of the pairing correlations for nucl…
Radiative decay of rho^0 and phi mesons in a chiral unitary approach
E. Marco, S. Hirenzaki, E. Oset +1
We study the rho^0 and phi decays into pi^+ pi^- gamma, pi^0 pi^0 gamma and phi into pi^0 eta gamma using a chiral unitary approach to deal with the final state interaction of the…
Theoretical Response to the Discovery of Deeply Bound Pionic States in 208Pb(d,3He) reactions
H. Toki, S. Hirenzaki, K. Takahashi
Recently, deeply bound pionic states were found experimentally in (d, He) reactions on Pb. They found an isolated peak structure in the bound region below the pion prod…
Spurious Shell Closures in the Relativistic Mean Field Model
L. S. Geng, J. Meng, H. Toki +2
Following a systematic theoretical study of the ground-state properties of over 7000 nuclei from the proton drip line to the neutron drip line in the relativistic mean field model…
A critical analysis on deeply bound kaonic states in nuclei
E. Oset, H. Toki
We make a critical analysis on the theoretical calculations that lead to predictions of deeply bound kaonic states in nuclei. The model set-up, after dropping several important pro…