The 34th International Symposium on Lattice Field Theory (Lattice 2016)

24-30 July 2016
Highfield Campus, University of Southampton
Europe/London timezone

Resonances in Coupled-Channel Scattering

25 Jul 2016, 10:30
30m
Building 32 (EEE) Room 1015 and Building 67 (Nightingale) Room 1027 via video link (Highfield Campus, University of Southampton)

Building 32 (EEE) Room 1015 and Building 67 (Nightingale) Room 1027 via video link

Highfield Campus, University of Southampton

Highfield Campus, Southampton SO17 1BJ, UK
Talk Plenary Session

Speaker

Dr David Wilson (University of Cambridge)

Description

Excited states in hadron physics are seen as resonances in the scattering of lighter stable hadrons like $\pi$, $K$ and $\eta$. Many decay into multiple final states necessitating coupled-channel analyses. Recently it has become possible to obtain coupled-channel scattering amplitudes from lattice QCD. Using large diverse bases of operators it is possible to obtain reliable finite volume spectra at energies where multiple channels are open. Utilising the finite volume formalism proposed by L\"uscher and extended by several others, scattering amplitudes can be extracted from the finite volume spectra. Recent applications will be discussed where the energy dependence of scattering amplitudes is mapped out in several quantum numbers. These are then continued to complex energies to extract resonance poles and couplings.

Primary author

Dr David Wilson (University of Cambridge)

 Slides