Lattice QCD with Nf=2 flavours of sea quark is used to explore the spectrum and decay of scalar mesons. We are able to determine the b1 - a0 mass difference and this leads to the conclusion that the lightest non-singlet scalar meson (a0) has a mass of 1.01(4) GeV. We determine from the lattice the coupling strength to KK and πη. We compute the leptonic decay constant of the lightest non-singlet scalar meson. We discuss the impact of these lattice results on the interpretation of the a0(980) state. We also discuss K0∗ states.
@article{arxiv.hep-lat/0604009,
title = {Properties of light scalar mesons from lattice QCD},
author = {C. McNeile and C. Michael},
journal= {arXiv preprint arXiv:hep-lat/0604009},
year = {2016}
}