Decuplet baryon structure from lattice QCD.

SU ( 3 ) lattice QCD study for octet and decuplet baryon spectra ∗

The spectra of octet and decuplet baryons are studied using SU(3) lattice QCD at the quenched level. As an implementation to reduce the statistical fluctuation, we employ the anisotropic lattice with O(a) improved quark action. In relation to Λ(1405), we measure also the mass of the SU(3) flavor-singlet negative-parity baryon, which is described as a three quark state in the quenched lattice QC...

Study of decuplet baryon resonances from lattice QCD

Negative-Parity Baryons in Quenched Anisotropic Lattice QCD

We study negative-parity baryon spectra in quenched anisotropic lattice QCD. The negative-parity baryons are measured as the parity partner of the ground-state baryons. In addition to the flavor octet and decuplet baryons, we pay much attention to the flavorsinglet negative-parity baryon as a three-quark state and compare it with the Λ(1405) baryon. Numerical results of the flavor octet and dec...

Baryon magnetic moments in the background field method

We present a calculation of the magnetic moments for the baryon octet and decuplet using the background-field method and standard Wilson gauge and fermion actions in the quenched approximation of lattice QCD. Progressively smaller static magnetic fields are introduced on a 244 lattice at beta=6.0 and the pion mass is probed down to about 500 MeV. Magnetic moments are extracted from the linear r...

SU(3)-breaking corrections to the hyperon vector coupling f1(0) in covariant baryon chiral perturbation theory

We report on a recent study of the SU(3)-breaking corrections to the hyperon vector coupling f1(0) up to O(p4) in covariant baryon chiral perturbation theory with dynamical octet and decuplet contributions. The decuplet contributions are taken into account for the first time in a covariant ChPT study and are found of similar or even larger size than the octet ones. We predict positive SU(3)-bre...