Finite size effect in excited baryon spectroscopy

Kiyoshi Sasaki, Shoichi Sasaki

Research output: Contribution to journalConference articlepeer-review


We investigate the finite size effect on masses of excited baryons in quenched lattice QCD simulation. For this purpose, we perform numerical simulations at three different lattice sizes, La ≈ 1.6, 2.2 and 3.2 fm. The gauge configurations are generated with the single plaquette gauge action at β 6/g2 62, and the quark propagator are computed with the Wilson fermion action. To access to two parity states of the nucleon and four different spin-parity states of the D baryon, the appropriate spin/parity projection are carried out. We find that the spatial lattice size is required to be as large as 3 fm to remove the finite size effect on excited baryons even in the heavy quark region (Mπ/Mρ ≈ 0.82 0.87), where that on the nucleon is negligible. On our largest lattice (La 32 fm), all mass spectra of the JP 1/2± nucleons and the JP 1/2±, 3/2± D baryons are roughly consistent with experimental values after naive chiral extrapolation.

Original languageEnglish
JournalProceedings of Science
Publication statusPublished - 2005
Externally publishedYes
Event23rd International Symposium on Lattice Field Theory, LAT 2005 - Dublin, Ireland
Duration: 2005 Jul 252005 Jul 30

ASJC Scopus subject areas

  • General


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