Speaker
Description
I will summarise some recent work on charm mesons and charmonium resonances, including exotics, using first-principles lattice QCD calculations. Investigations of S-wave $D\pi$ scattering will be presented, relevant for the $D^{\ast}_0(2300)$ and the enigmatic $D^{\ast}_{s0}(2317)$, where an exotic-flavour virtual bound state was found. Of other results that will be discussed, a highlight is a study of scalar and tensor charmonium resonances where a single $\chi_{c0}$ and a single $\chi_{c2}$ resonance were found in the energy region up to about 4100 MeV. Above the $\chi_{c0}$ ground state, no other scalar bound states or near-$D\bar{D}$ threshold resonances were found, in contrast to a number of theoretical and experimental studies. I will also comment on future prospects.
