Light Hadron Spectrum in Quenched Lattice QCD with Staggered Quarks

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 a...

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Published in:arXiv.org 1999-12
Main Authors: Kim, Seyong, Ohta, Shigemi
Format: Article
Language:English
Subjects:
Broken symmetry
Flavor (particle physics)
Quantum chromodynamics
Quarks
Quenching
Rho-mesons
Systematic errors
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description 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.
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subjects Broken symmetry
Flavor (particle physics)
Quantum chromodynamics
Quarks
Quenching
Rho-mesons
Systematic errors
title Light Hadron Spectrum in Quenched Lattice QCD with Staggered Quarks
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