Speaker
Description
The spectroscopy of open-charm mesons offers new insights into the dynamics of low-energy QCD and a point to connect with both experiment and EFT calculations.
In this talk I present the first extraction of the lowest axial-vector and tensor D-meson resonances from a coupled $D^*\pi$, $D^*\eta$ and $D_s^* \bar{K}$ scattering calculation in $N_f=2+1$ lattice QCD at a pion mass of 391 MeV. The spectrum is computed from a large basis of interpolating operators using distillation and the generalised-eigenvalue method. A finite-volume quantisation condition constrains the S- and D-wave amplitudes which are analytically continued to the complex plane and examined for singularities. I discuss our findings in the context of experiment and unitarised-chiral-perturbation theory results.
