We review briefly recent studies of the Lambda(1405) spectrum in Lattice QCD. Ordinary three-quark pictures of the Lambda(1405) in quenched Lattice QCD fail to reproduce the mass of the experimental value, which seems to support the penta-quark picture for the Lambda(1405) such as a Kbar-N molecule-like state. It is also noted that the present results suffer from relatively large systematic uncertainties coming from the finite volume effect, the chiral extrapolation and the quenching effect.
@article{arxiv.hep-lat/0404012,
title = {Lambda(1405) and Negative-Parity Baryons in Lattice QCD},
author = {Y. Nemoto and N. Nakajima and H. Matsufuru and H. Suganuma},
journal= {arXiv preprint arXiv:hep-lat/0404012},
year = {2007}
}
Comments
3 pages, 4 figures, talk given at the YITP workshop, ``Multi-quark Hadrons; Four, Five and More?", Kyoto, Japan, 17-19 February 2004