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Meson-baryon couplings and the ratio from QCD sum rules
Hungchong Kim, Takumi Doi, Makoto Oka +2
Motivated by the recent work on the calculation of the coupling constant using QCD sum rule beyond the chiral limit, we construct the corresponding sum rules for the coupling…
Weak Decay of in Nuclei: Direct Quark Mechanism vs Meson Exchange
Makoto Oka, Kenji Sasaki, Takashi Inoue
Nonmesonic decays of in nuclear medium and light hypernuclei are studied by using the weak transition potential derived from the meson exchange mechanism and the di…
Chiral Symmetry and Weak Decay of Hypernuclei
Makoto Oka
The weak decays of hyperons and hypernuclei are studied from the chiral symmetry viewpoint. The soft pion relations are useful in understanding the isospin properties of the weak h…
Chiral Unitary Approach To The N*N*pi, N*N*eta Couplings For The N*(1535) Resonance
J. C. Nacher, A. Parreno, E. Oset +3
Using a chiral unitary model in which the negative parity nucleon resonance is generated dynamically by means of the Bethe Salpeter equation with coupl…
Renormalization Group Approach to the O(N) linear Sigma Model at Finite Temperature
T. Umekawa, K. Naito, M. Oka
The Wilsonian renormalization group (RG) method is applied to finite temperature systems for the study of non-perturbative methods in the field theory. We choose the O(N) linear si…
QCD sum rules with two-point correlation function
Hungchong Kim, Su Houng Lee, Makoto Oka
We construct three different sum rules from the two-point correlation function with pion, , beyond the soft-pion limit. T…