出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We investigate the mass spectra of Q+(udud ¯ s) in quenched lattice QCD, with overlap andWilson
fermions respectively. Using three different interpolating operators, we measure their correlation
matrix, and extract the mass spectra in even and odd parity channels, for 100 gauge configurations
generated with single plaquette action at b = 6.1 on the 203 ×40 lattice. The lowest 1/2− state
agrees with the KN s-wave scattering state, for both fermion schemes. On the other hand, for the
lowest 1/2+ state, it is different from any hadron scattering states for the overlap fermion, while
it seems to agree with KN∗ s-wave for the Wilson fermion.
