Excited and exotic charmonium, DsD_s and DD meson spectra for two light quark masses from lattice QCD

Oct 4, 2016
22 pages
Published in:
  • JHEP 12 (2016) 089
  • Published: Dec 19, 2016
e-Print:
Report number:
  • DAMTP-2016-63

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Abstract: (Springer)
We present highly-excited charmonium, Ds_{s} and D meson spectra from dynamical lattice QCD calculations with light quarks corresponding to Mπ_{π} ∼ 240 MeV and compare these to previous results with Mπ_{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 Mπ_{π} , we find only a mild light-quark mass dependence and no change in the overall pattern of states.
Note:
  • 21 pages, 8 figures, minor changes to reflect published version
  • Lattice field theory simulation
  • QCD Phenomenology
  • charmonium: hadron spectroscopy
  • D/s: mass spectrum: calculated
  • quantum number: exotic
  • meson: hybrid
  • excited state
  • spin
  • quark: mass dependence
  • quantum chromodynamics: lattice