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Relativistic Bottomonium Spectrum from Anisotropic Lattices
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We report on a first relativistic calculation of the quenched bottomonium spectrum from anisotropic lattices. Using a very fine discretisation in the temporal direction we were able to go beyond the non-relativistic approximation and perform a continuum extrapolation of our results from five different lattice spacings (0.04-0.17 fm) and two anisotropies (4 and 5). We investigate several systematic errors within the quenched approximation and compare our results with those from non-relativistic simulations.
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Cited by 2 Pith papers
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Lattice QCD determination of the radiative decay rates $h_{c}\to \eta_{c}\, \gamma$ and $h_{b}\to \eta_{b}\, \gamma$
Using five lattice spacings with physical quark masses, the authors obtain Gamma(h_c->eta_c gamma)=0.604(24) MeV and the first lattice QCD estimate Gamma(h_b->eta_b gamma)=46.0(4.8) keV.
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QCD spin effects in the heavy hybrid potentials and spectra
Nonperturbative spin-dependent hybrid potentials are expressed as gluonic correlators, fitted to charmonium lattice data, and used to predict bottomonium hybrid spectra.
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