# Resonances in coupled-channel scattering from lattice QCD

#### Resonances in coupled-channel scattering from lattice QCD

- Event time: 2:00pm
- Event date: 17th April 2019
- Speaker: David Wilson (Trinity College Dublin)
- Location: Higgs Centre Seminar Room, Room 4305, James Clerk Maxwell Building (JCMB) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB

### Event details

Understanding the excited spectrum of hadrons from first principles remains a challenging prospect. The majority of excited hadrons are seen as resonances in the scattering of lighter stable hadrons like pions and kaons. Many resonances decay into multiple final states necessitating coupled-channel analyses, and recently it has become possible to obtain coupled-channel scattering amplitudes from lattice QCD. I will describe the methods used in these calculations, to first compute large correlation matrices, that are then used to obtain the energy levels that constrain the infinite volume scattering amplitudes. Several recent applications of these methods will be discussed, including the extractions of scalar resonances obtained from strongly-coupled coupled-channel scattering amplitudes.

### About Particle Physics Theory seminars

The Particle Physics Theory seminar is a weekly series of talks reflecting the diverse interests of the group. Topics include analytic and numerical calculations based on the Standard Model of elementary particle physics, theories exploring new physics, as well as more formal developments in gauge theories and gravity..