Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2003-12-18
Nucl.Phys. A721 (2003) 879-882
Physics
High Energy Physics
High Energy Physics - Lattice
4 pages, 4 figs. Talk given at 16th International Conference on Particles and Nuclei (PANIC 02), Osaka, Japan, 30 Sep - 4 Oct
Scientific paper
10.1016/S0375-9474(03)01233-8
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 flavor-singlet negative-parity baryon as a three-quark state and compare it with the Lambda(1405) baryon. Numerical results of the flavor octet and decuplet negative-parity baryon masses are close to experimental values of lowest-lying negative-parity baryons, while the flavor-singlet baryon is much heavier than Lambda(1405). This indicates that the Lambda(1405) would be a multi-quark state such as the N-Kbar molecule rather than the flavor-singlet 3 quark state.
Matsufuru Hideo
Nakajima Noriaki
Nemoto Yukio
Suganuma Hideo
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