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Nucleon axial couplings and [(1/2,0) + (0,1/2)]-[(1,1/2) + (1/2,1)] chiral multiplet mixing
V. Dmitrasinovic, A. Hosaka, K. Nagata
Three-quark nucleon interpolating fields in QCD have well-defined SU_L(2) x SU_R(2) and U_A(1) chiral transformation properties. Mixing of the [(1,1/2) + (1/2,1)] chiral multiplet…
Light Scalar Meson sigma(600) in QCD Sum Rule with Continuum
Hua-Xing Chen, Atsushi Hosaka, Hiroshi Toki +1
The light scalar meson sigma(600) is known to appear at low excitation energy with very large width on top of continuum states. We investigate it in the QCD sum rule as an example…
Baryon Fields with U_L(3) \times U_R(3) Chiral Symmetry: Axial Currents of Nucleons and Hyperons
Hua-Xing Chen, V. Dmitrasinovic, Atsushi Hosaka
We use the conventional F and D octet and decimet generator matrices to reformulate chiral properties of local (non-derivative) and one-derivative non-local fields of baryons consi…
Meson-baryon nature of Lambda(1405) in chiral dynamics
Tetsuo Hyodo, Daisuke Jido, Atsushi Hosaka
We present the recent progress in the study on the origin of baryon resonances in chiral dynamics. It is shown that in the chiral coupled-channel approach, the form of the interact…
Origin of resonances in chiral dynamics
Tetsuo Hyodo, Daisuke Jido, Atsushi Hosaka
The nature of baryon resonances is studied in the dynamical chiral coupled-channel approach for meson-baryon scattering. In general, origin of resonances in two-body scattering can…
A coupled-channel analysis for phi-photoproduction with Lambda(1520)
S. Ozaki, H. Nagahiro, A. Hosaka +1
We investigate photoproduction of -mesons off protons within a coupled-channel effective-Lagrangian method which is based on the K-matrix approach. Since the threshold energy of…