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Resonances in coupled-channel scattering from lattice QCD

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If you have a question about this talk, please contact Christopher Thomas .

For the first time we have obtained clear signals of resonances in coupled-channel meson-meson scattering from lattice QCD . We extract a precise spectrum of energy levels relevant to pion-kaon and eta-kaon scattering with isospin-1/2, from lattices with three volumes and several moving frames. By using the Luescher method and recent generalisations, these finite-volume energy levels are related to the infinite volume coupled-channel scattering amplitudes that clearly describe S, P and D wave resonances. In S-wave we find a broad resonance coupling dominantly to the pion-kaon channel and a narrow resonance in D-wave.

This talk is part of the Lattice field theory informal seminars series.

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