Speaker: Stephan Durr In the SU(2) framework there is a number of new results, and improved estimates of \bar\ell_3 and \bar\ell_4 can be given. In the SU(3) framework very few new lattice computations are available and the improvement in the precision of the low-energy constants L_i is comparatively slow. I will sketch some of the convergence issues genuine to extensions of the chiral framework which include additional sources of chiral symmetry breaking (finite lattice spacing) and/or violations of unitarity (different sea and valence quark masses). If time permits it will be pointed out that the quark mass ratios m_u/m_d and m_s/m_d happen to be such that no reorderings of the chiral series are needed. |