Abstract
A study of the finite-size effect is carried out for spectra of both ground-state and excited-state baryons in quenched lattice QCD using Wilson fermions. Our simulations are performed at β=6/g2=6.2 with three different spatial sizes, La∼ 1.6, 2.2 and 3.2 fm. It is found that the physical lattice size larger than 3 fm is required for Δ states in all spin-parity (JP=1/2±,3/2±) channels and also negative-parity nucleon (N*) state (JP=1/2-) even in the rather heavy quark mass region (Mπ∼1.0GeV). We also find a peculiar behavior of the finite-size effect on the hyperfine mass splittings between the nucleon and the Δ in both parity channels.
| Original language | English |
|---|---|
| Article number | 034502 |
| Pages (from-to) | 1-13 |
| Number of pages | 13 |
| Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
| Volume | 72 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2005 Aug 1 |
| Externally published | Yes |
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)