A study of pentaquarks on the lattice with overlap fermions
Journal Article
·
· Physical Review D
We present a quenched lattice QCD calculation of spin-1/2 five-quark states with uudd{bar s} quark content for both positive and negative parities. We do not observe any bound pentaquark state in these channels for either I = 0 or I = 1. The states we found are consistent with KN 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, 12{sup 3} x 28 and 16{sup 3} x 28, with the same lattice spacing of 0.2 fm, and pion mass as low as {approx} 180 MeV.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 836606
- Report Number(s):
- JLAB-THY-04-66; DOE/ER/40150-3115; hep-ph/0406196; TRN: US0500694
- Journal Information:
- Physical Review D, Vol. 70; Other Information: PBD: 1 Oct 2004
- Country of Publication:
- United States
- Language:
- English
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