360 citations · 6.1k across the 180 of their papers we have counts for
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Why do we need instantons in strangeness hadron physics?
Makoto Oka
Roles of instantons in strangeness hadron physics are discussed. After introducing general features of instantons, hadron spectroscopy under the influence of instanton-quark effect…
Contribution of Instanton Induced Interaction for Penta-quarks in MIT Bag Model
Tetsuya Shinozaki, Makoto Oka, Sachiko Takeuchi
Roles of instanton induced interactions (III) in the masses of pentaquark baryons, Theta^+ (J=1/2 and 3/2) and Xi^{--}, and a dibaryon, H, are discussed using the MIT bag model. It…
Lattice-QCD based Schwinger-Dyson approach for Chiral Phase Transition
Hideaki Iida, Makoto Oka, Hideo Suganuma
Dynamical chiral-symmetry breaking in QCD is studied with the Schwinger-Dyson (SD) formalism based on lattice QCD data, i.e., LQCD-based SD formalism. We extract the SD kernel func…
QCD Sum Rules of Pentaquarks
Makoto Oka
QCD sum rule is applied to the pentaquark spectroscopy. It is concluded that no positive parity state is seen in low energy region, while there may exist negative parity states at…
Penta-Quark Anti-Decuplet in Anisotropic Lattice QCD
N. Ishii, T. Doi, H. Iida +3
The penta-quark(5Q) Theta^+(1540) is studied in anisotropic lattice QCD with renormalized anisotropy a_s/a_t=4 for a high-precision measurement. Both the positive and the negative…
The lattice QCD simulation of the quark-gluon mixed condensate g<\bar{q} σG q> at finite temperature and the phase transition of QCD
Takumi Doi, Noriyoshi Ishii, Makoto Oka +1
The thermal effects on the quark-gluon mixed condensate g<\bar{q} σG q>, which is another chiral order parameter, are studied using the SU(3)c lattice QCD with the Kogut-Susskind f…
Effects of Instanton Induced Interaction on the Pentaquarks
Tetsuya Shinozaki, Makoto Oka, Sachiko Takeuchi
Roles of instanton induced interactions (III) in the masses of pentaquark baryons, Theta^+ (J=1/2 and 3/2) and Xi^{--}, and a dibaryon, H, are discussed using the MIT bag model in…
Theoretical Overview of the Pentaquark Baryons
Makoto Oka
A review is given of the theoretical ideas concerning the mysterious pentaquark baryons proposed during the first year after its discovery. We focus on the difficulties involved wi…
Models of the Nonmesonic Weak Decay
Makoto Oka
I review the current status of understanding the mechanism of the nonmesonic weak decays (NMWD) of hypernuclei. Long standing problem on the Gamma_n/Gamma_p ratio has been solved b…
Light Scalar Mesons in the Improved Ladder QCD
Toru Umekawa, Kenichi Naito, Makoto Oka +1
The light scalar meson spectrum is studied using the improved ladder QCD with the UA(1) breaking Kobayashi-Maskawa-'t Hooft interaction by solving the Schwinger-Dyson and Bethe-Sal…
Thermal effects on quark-gluon mixed condensate g<\bar{q} σG q> from lattice QCD
Takumi Doi, Noriyoshi Ishii, Makoto Oka +1
We present the first study of the thermal effects on the quark-gluon mixed condensate g<\bar{q} σG q>, which is another chiral order parameter, in SU(3)c lattice QCD with the Kogut…