Excited and exotic charmonium, D s and D meson spectra for two light quark masses from lattice QCD

We present highly-excited charmonium, d s and d meson spectra from dynamical lattice qcd calculations with light quarks corresponding to m π ∼ 240 mev and compare these to previous results with m π ∼ 400 mev. utilising the distillation framework, large bases of carefully constructed interpolating operators and a variational procedure, we extract and reliably identify the continuum spin of an extensive set of excited mesons. these include states with exotic quantum numbers which, along with a number with non-exotic quantum numbers, we identify as having excited gluonic degrees of freedom and interpret as hybrid mesons. comparing the spectra at the two different m π , we find only a mild light-quark mass dependence and no change in the overall pattern of states.