The Spectrum from Lattice NRQCD

Details The Spectrum from Lattice NRQCD The Spectrum from Lattice NRQCD

1997-05-29

arxiv.org/abs/hep-lat/9705039v1

Nucl.Phys.Proc.Suppl. 60A (1998) 124-133

Physics

High Energy Physics

High Energy Physics - Lattice

10 pages, Latex. 10 figures, 7 in postscript. Review for Tsukuba workshop

Scientific paper

10.1016/S0920-5632(97)00474-X

I review recent results for heavy-heavy spectroscopy using Lattice NRQCD. The NRQCD collaboration reports that spin-independent splittings for the $\Upsilon$ are scaling for a sensible range of $\beta$ values in the quenched approximation. Spin-dependent splittings are not, if the scale is set by spin-independent splittings. Results which include higher order spin-dependent relativistic and discretisation corrections show differences from previous (NRQCD collaboration) results without these. As expected, the differences are small for $\Upsilon$ but rather large for charmonium. New results from the SESAM collaboration for $\Upsilon$ spectroscopy on configurations with Wilson dynamical fermions show good agreement with previous results on HEMCGC configurations with staggered dynamical fermions.

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