Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
1998-12-19
Phys.Rev.Lett. 82 (1999) 4396-4399
Physics
High Energy Physics
High Energy Physics - Lattice
7 pages, Latex, 3 figures
Scientific paper
10.1103/PhysRevLett.82.4396
We report on a study of heavy hybrid states using the NRQCD approach on coarse and asymmetric lattices, where we discard vacuum polarisation effects and neglect all spin-correction terms. We find a clear hybrid signal on all our lattices ($a_s= 0.15 ... 0.47$ fm). We have studied in detail the lattice spacing artefacts, finite volume effects and mass dependence. Within the above approximations we predict the hybrid excitation in Charmonium to be 1.323(13) GeV above its ground state. The bottomonium hybrid was found to be 1.542(8) GeV above its ground state.
Aoki Sadao
Burkhalter Rudolf
Ejiri Shinji
Fukugita Masaaka
Hashimoto Shigehira
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