360 citations · 6.1k across the 180 of their papers we have counts for
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Hyperon Non-leptonic Weak Decays in the Chiral Perturbation Theory II
K. Takayama, M. Oka
Hyperon non-leptonic weak decay amplitudes are studied in the chiral perturbation theory. The weak interaction vertices caused by the four quark operators are substituted by the pr…
Roles of Quarks in Strong and Weak YN Interactions
M. Oka, Y. Tani, T. Inoue +1
The short range parts of the strong and weak hyperon-nucleon interactions are studied with quark substructure of the baryons taken into account. A summary of the quark cluster mode…
Two-point correlation function with pion in QCD sum rules
Hungchong Kim, Su Houng Lee, Makoto Oka
Within the framework of the conventional QCD sum rules, we study the pion two-point correlation function, , beyond the s…
Hyperon Non-leptonic Weak Decays in the Chiral Perturbation Theory I
K. Takayama, M. Oka
Hyperon non-leptonic weak decay amplitudes are studied in the chiral perturbation theory. We employ the low energy effective weak Hamiltonian which contains the perturbative QCD co…
QCD sum rule calculation of the coupling-revisited
Hungchong Kim, Su Houng Lee, Makoto Oka
In the conventional QCD sum rule calculation for the coupling beyond the soft-pion limit, there are three distinct Dirac structures, each of which can be used to construct se…
Suppression of Pi NN* Coupling and Chiral Symmetry
D. Jido, Y. Nemoto, M. Oka +1
Meson-baryon couplings between positive and negative parity nucleons are investigated using two point correlation functions in the soft meson and the chiral limit. We find that the…
Direct Quark Mechanism for Weak $\Lam N \leftrightarrow NN$ Processes
Makoto Oka
Two body weak processes are studied from the viewpoint of quark substructure of baryons.They can be studied in nonmesonic weak decays of hypernuclei and als…