Flavor Singlet Meson Mass in the Continuum Limit in Two-Flavor Lattice QCD

Abstract

We present results for the mass of the eta-prime meson in the continuum limit for two-flavor lattice QCD, calculated on the CP-PACS computer, using a renormalization-group improved gauge action, and Sheikholeslami and Wohlert's fermion action with tadpole-improved csw. Correlation functions are measured at three values of the coupling constant beta corresponding to the lattice spacing a approx. 0.22, 0.16, 0.11 fm and for four values of the quark mass parameter kappa corresponding to mpi over mrho approx. 0.8, 0.75, 0.7 and 0.6. For each beta, kappa pair, 400-800 gauge configurations are used. The two-loop diagrams are evaluated using a noisy source method. We calculate eta-prime propagators using local sources, and find that excited state contributions are much reduced by smearing. A full analysis for the smeared propagators gives metaprime=0.960(87)+0.036-0.248 GeV, in the continuum limit, where the second error represents the systematic uncertainty coming from varying the functional form for chiral and continuum extrapolations.

arXiv comment9 pages, 19 figures, 4 tables

References in corpus (9)

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Cited by in corpus (19)

• Theta dependence of SU(N) gauge theories in the presence of a topological term
• Light Hadron Masses from Lattice QCD
• Masses and decay constants of the $\eta$ and ${\eta }^{\prime }$ mesons from lattice QCD
• The eta' meson from lattice QCD
• Flavor-singlet meson decay constants from $N_f=2+1+1$ twisted mass lattice QCD
• Improved Wilson QCD simulations with light quark masses
• eta' meson From Two Flavor Dynamical Domain Wall Fermions
• Theta vacuum effects on the chiral condensation and the eta^prime meson correlators in the two-flavor massive QED_2 on the lattice
• Physics of eta-prime with rooted staggered quarks
• Methods for Pseudoscalar Flavour-Singlet Mesons with Staggered Fermions
• The low-lying mass spectrum of the N=1 SU(2) SUSY Yang-Mills theory with Wilson fermions
• Topological susceptibility and ${\eta }^{\prime }$ meson mass from $N_f=2$ lattice QCD at the physical point
• Two flavors of dynamical quarks on anisotropic lattices
• $\eta$-glueball mixing from $N_f=2$ lattice QCD
• Hard hadron spectroscopy
• Hadron Spectrum from Dynamical Lattice QCD Simulations
• Towards measuring the eta' mass with N_f=2+1 staggered fermions
• $\eta$ and ${\eta }^{\prime }$ mesons from $N_f=2+1$ lattice QCD at the physical point using topological charge operators
• Pseudoscalar singlet physics with staggered fermions