Abstract
We report on progress applying the stochastic LapH method to estimate all-to-all propagators required in correlation functions of multi-hadron operators relevant for pion-pion scattering. Largevolume results for I = 2 and I = 1 pion-pion scattering phase shifts with good statistical precision are obtained from an Nf = 2+ 1 anisotropic Wilson clover ensemble with mπ = 240MeV. We also present a preliminary determination of the I = 1 pion-pion scattering phase shift and timelike pion form factor on an isotropic Nf = 2+1 flavour ensemble generated by the Coordinated Lattice Simulation (CLS) community effort.
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