Light Hadron Spectrum in Quenched Lattice QCD with Staggered Quarks
High Energy Physics - Lattice
2009-10-31 v1
Abstract
Without chiral extrapolation, we achieved a realistic nucleon to (\rho)-meson mass ratio of (m_N/m_\rho = 1.23 \pm 0.04 ({\rm statistical}) \pm 0.02 ({\rm systematic})) in our quenched lattice QCD numerical calculation with staggered quarks. The systematic error is mostly from finite-volume effect and the finite-spacing effect is negligible. The flavor symmetry breaking in the pion and (\rho) meson is no longer visible. The lattice cutoff is set at 3.63 (\pm) 0.06 GeV, the spatial lattice volume is (2.59 (\pm) 0.05 fm)(^3), and bare quarks mass as low as 4.5 MeV are used. Possible quenched chiral effects in hadron mass are discussed.
Keywords
Cite
@article{arxiv.hep-lat/9912001,
title = {Light Hadron Spectrum in Quenched Lattice QCD with Staggered Quarks},
author = {Seyong Kim and Shigemi Ohta},
journal= {arXiv preprint arXiv:hep-lat/9912001},
year = {2009}
}
Comments
5 pages and 5 figures, use revtex4