Abstract
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.
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Cheung, G.K., O’Hara, C., Moir, G. et al. Excited and exotic charmonium, D s and D meson spectra for two light quark masses from lattice QCD. J. High Energ. Phys. 2016, 89 (2016). https://doi.org/10.1007/JHEP12(2016)089
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DOI: https://doi.org/10.1007/JHEP12(2016)089