Resonances in coupled-channel scattering from lattice QCD

Mar 15, 2017, 11:00 AM
30m
Lecture Hall (Bad Honnef)

Lecture Hall

Bad Honnef

Speaker

Mr David Wilson (University of Cambridge)

Description

"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 one of these calculations, beginning with the computation of the finite-volume spectra, that are used to constrain infinite-volume scattering t-matrices, from which the complex resonance poles can be extracted. Several recent applications of these methods will be described, including the first extraction of a strongly-coupled coupled-channel scattering amplitude from lattice QCD where an a0 resonance was found in pi-eta K-Kbar scattering.”

Presentation materials