Excited mesons and resonances from lattice QCD

by Christopher Thomas (DAMTP, University of Cambridge, UK)

Monday 18 Sept 2017, 14:30 → 16:00 Europe/Rome

Aula Careri (Dipartimento di Fisica - Ed. G.Marconi)

I will discuss some recent progress in studying excited and exotic mesons using lattice QCD. The majority of hadrons are unstable -- they decay strongly to two or more lighter hadrons and appear as resonances complex singularities in hadron-hadron scattering amplitudes. Moreover, over the last decade experiments have observed a number of puzzling states near or above thresholds. Lattice QCD provides a method to perform first-principles calculations of these phenomena which can be compared against experiment, but studying resonances is challenging. I summarise how we have recently made significant advances in this area and present a few applications in the heavy and light-meson sectors