Resonances in coupled-channel scattering from QCD

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• David Wilson (DAMTP)
• Friday 15 January 2016, 16:00-17:00
• B1.19, DAMTP.

If you have a question about this talk, please contact Marco Nardecchia.

The excited states in hadron physics are seen as resonances in the scattering of light stable states in QCD , like pions and kaons. Many excited states also decay into multiple final states, necessitating coupled-channel analyses. Recently it has become possible to obtain coupled-channel scattering amplitudes using lattice QCD . Using a large basis of operators we are able to obtain a reliable finite volume spectrum describing, for example, the pi-K, eta-K coupled system. Utilising the finite volume formalism proposed by Luescher and extended by several others we are able to obtain coupled-channel scattering amplitudes with resonant structures in the complex plane. Results regarding the rho resonance at multiple pion masses, and an a0 resonance seen in strongly-coupled pi-eta, K-Kbar scattering will also be presented.

This talk is part of the HEP phenomenology joint Cavendish-DAMTP seminar series.

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