We present a quenched lattice QCD calculation of spin-[Formula Presented] five-quark states with [Formula Presented] quark content for both positive and negative parities. We do not observe any bound pentaquark state in these channels for either [Formula Presented] or [Formula Presented]. The states we found are consistent with [Formula Presented] scattering states which are checked to exhibit the expected volume dependence of the spectral weight. The results are based on overlap-fermion propagators on two lattices, [Formula Presented] and [Formula Presented], with the same lattice spacing of 0.2 fm, and pion mass as low as [Formula Presented].
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|State||Published - 2004|
Bibliographical noteFunding Information:
We thank S. Sasaki for useful discussions. This work is supported in part by U.S. Department of Energy under Grant No. DE-FG05-84ER40154 and No. DE-FG02-95ER40907. The computing resources at NERSC (operated by DOE under No. DE-AC03-76SF00098) are also acknowledged.
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)