Continuum limit of lattice QCD with staggered quarks in the quenched approximation: A critical role for the chiral extrapolation

Claude Bernard, Tom Blum, Carleton DeTar, Steven Gottlieb, Urs M. Heller, James E. Hetrick, Craig McNeile, K. Rummukainen, R. Sugar, D. Toussaint

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

We calculate the light quark spectrum of lattice QCD in the quenched approximation using staggered quarks. We take the light quark mass, infinite volume, continuum limit. With nonlinear chiral extrapolations, we find that the nucleon to ρ mass ratio is mN/mρ = 1.254 ± 0.018 ± 0.028, where the errors are statistical and systematic (within the quenched approximation), respectively. Since the experimental value is 1.22, our results indicate that the error due to quenching is ≲5%.

Original languageEnglish (US)
Pages (from-to)3087-3090
Number of pages4
JournalPhysical review letters
Volume81
Issue number15
DOIs
StatePublished - Jan 1 1998

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Bernard, C., Blum, T., DeTar, C., Gottlieb, S., Heller, U. M., Hetrick, J. E., McNeile, C., Rummukainen, K., Sugar, R., & Toussaint, D. (1998). Continuum limit of lattice QCD with staggered quarks in the quenched approximation: A critical role for the chiral extrapolation. Physical review letters, 81(15), 3087-3090. https://doi.org/10.1103/PhysRevLett.81.3087