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Article overview
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Pion-Nucleon Sigma Term in Lattice QCD | M. Fukugita
; Y. Kuramashi
; M. Okawa
; A. Ukawa
; | Date: |
2 Aug 1994 | Journal: | Phys.Rev. D51 (1995) 5319-5322 | Subject: | hep-lat | Abstract: | We calculate both connected and disconnected contribution to the $pi$-$N$ $sigma$-term in quenched lattice QCD with Wilson quark action on a $12^3 imes 20$ lattice at $eta=5.7$. The latter is evaluated with the aid of the variant wall source method, which was previously applied successfully for extraction of $pi$-$pi$ scattering lengths and $eta^prime$ meson mass. We found that the disconnected contribution is about twice larger than the connected one. The value for the full $pi$-$N$ $sigma$ term $sigma=40-60$ MeV is consistent with the experimental estimates. The nucleon matrix element of the strange quark density $ar s s$ is fairly large in our result. | Source: | arXiv, hep-lat/9408002 | Other source: | [GID 1074405] pmid10019007 | Services: | Forum | Review | PDF | Favorites |
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