Unitarized Chiral Perturbation Theory in a finite volume: scalar meson   sector
  We develop a scheme for the extraction of the properties of the scalar mesons f0(600), f0(980), and a0(980) from lattice QCD data. This scheme is based on a two-channel chiral unitary approach with fully relativistic propagators in a finite volume. In order to discuss the feasibility of finding the mass and width of the scalar resonances, we analyze synthetic lattice data with a fixed error assigned, and show that the framework can be indeed used for an accurate determination of resonance pole positions in the multi-channel scattering. 
M. D\"oring, U.-G. Mei{\ss}ner, E. Oset, A. Rusetsky
hep-lat hep-ph nucl-th