Excited states for heavy quark systems in NRQCD

S. M. Catterall, F. R. Devlin, I. T. Drummond, R. R. Horgan

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Following the Non-Relativistic QCD approach we use a gauge invariant smearing method with factorization to measure the excitation energies for a heavy QQ system on a 243 × 48 lattice at β = 6.2. The quark Hamiltonian contains only the simplest non-relativistic kinetic energy term. The mass splittings are not sensitive to the quark mass. For an appropriate choice of UV cut-off (a-1 = 3.2Gev) the mass spectrum compares reasonably well with the experimental values for the spin-averaged energy gaps of the υ system. Our results for the DE and DT waves at the lowest bare quark mass exhibit degeneracy between the two D-waves.

Original languageEnglish (US)
Pages (from-to)431-433
Number of pages3
JournalNuclear Physics B (Proceedings Supplements)
Issue numberC
StatePublished - Apr 1994
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics


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