Chiral and continuum extrapolation of partially-quenched lattice results

Copyright © 2005 Elsevier B.V. All rights reserved.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. © 2005 Elsevier B.V. All rights reserved.C.R. Allton, W. Armour, D.B. Leinweber, A.W. Thomas and R.D. Younghttp://www.elsevier.com/wps/find/journaldescription.cws_home/505706/description#descriptio