Excited baryon spectroscopy from lattice QCD: Finite size effect and hyperfine mass splitting

Kiyoshi Sasaki, Shoichi Sasaki

研究成果: Article査読

42 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号034502
ページ(範囲)1-13
ページ数13
ジャーナルPhysical Review D - Particles, Fields, Gravitation and Cosmology
72
3
DOI
出版ステータスPublished - 2005 8月 1
外部発表はい

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 物理学および天文学(その他)

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