Abstract
We propose baryon interpolating operators, which are based on an exotic description of the antidecuplet baryon, like the diquark-diquark-antiquark structure. By using one of the new operators, the mass spectrum of the spin- pentaquark states is calculated in quenched lattice QCD at on a lattice. It is found that the assignment of the lowest state is most likely . We also calculate the mass of the charm analog of the and find that the state lies much higher than the threshold, in contrast to several model predictions.
- Received 6 October 2003
DOI:https://doi.org/10.1103/PhysRevLett.93.152001
©2004 American Physical Society