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Multi-meson States in Lattice QCD

In this contribution, I summarise the studies of the properties of Bose-Einstein condensed systems composed of up to twelve pions or kaons carried out by the NPLQCD collaboration. These investigations have provided precise determination the I=2 pi-pi and I=1 K-K scattering lengths and the first determination of three-hadron interactions from QCD, finding a repulsive three-pion interaction of size consistent with naive dimensional analysis and a three kaon interaction consistent with zero. We have also determined the isospin (strangeness) density dependence of the isospin (strangeness) chemical potential, finding results in surprisingly good agreement with chiral perturbation theory.

preprint2008arXivOpen access
William Detmold
hep-lat
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William Detmold

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