Chiral and Continuum Extrapolation of Partially-Quenched Lattice Results

Details Chiral and Continuum Extrapolation of Partially-Quenched Lattice Results Chiral and Continuum Extrapolation of Partially-Quenched Lattice Results

2005-04-28

arxiv.org/abs/hep-lat/0504022v2

Phys.Lett.B628:125-130,2005

Physics

High Energy Physics

High Energy Physics - Lattice

9 pages, 3 figures; revised version appearing in PLB

Scientific paper

10.1016/j.physletb.2005.09.020

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.

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