Abstract
We investigate the mass spectrum of the pentaquark baryon () in quenched lattice QCD with exact chiral symmetry. Using three different interpolating operators for , we measure the correlation matrix and obtain the eigenvalues with parity for 100 gauge configurations generated with Wilson gauge action at on the lattice. For the lowest-lying state, its mass is almost identical to that of the wave, while for the lowest-lying state, its mass is smaller than that of the wave, especially for the regime . By chiral extrapolation (linear in ) to , we obtain the masses of the lowest-lying states: and , in agreement with the masses of and , respectively.
4 More- Received 24 January 2005
DOI:https://doi.org/10.1103/PhysRevD.72.034505
©2005 American Physical Society