Chiral and Continuum Extrapolation of Partially-Quenched Lattice Results

Abstract

The vector meson mass is extracted from a large sample of partially quenched, two-flavor lattice QCD simulations. For the first time, discretisation, finite-volume and partial quenching artefacts are treated in a unified framework which is consistent with the low-energy behaviour of QCD. This analysis incorporates the leading infrared behaviour dictated by chiral effective field theory. As the two-pion decay channel cannot be described by a low-energy expansion alone, a highly-constrained model for the decay channel of the rho-meson is introduced. The latter is essential for extrapolating lattice results from the quark-mass regime where the rho is observed to be a physical bound state.

9 pages, 3 figures; revised version appearing in PLB

References in corpus (8)

• Precise determination of the strangeness magnetic moment of the nucleon
• Nucleon Masses and Magnetic Moments in a Finite Volume
• Baryon Axial Charge in a Finite Volume
• Infrared regularization for spin-1 fields
• Lattice QCD with two dynamical flavors of domain wall quarks
• Leading Quenching Effects in the Proton Magnetic Moment
• Scaling of FLIC Fermions
• Volume dependences from lattice chiral perturbation theory

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