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Scaling of the Upsilon Spectrum in Lattice NRQCD

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arxiv hep-lat/9802024 v2 pith:7ULI763T submitted 1998-02-18 hep-lat

C. T. H. Davies , K. Hornbostel , G. P. Lepage , A. Lidsey , P. McCallum , J. Shigemitsu , J. Sloan This is my paper · ORCID
classification hep-lat
keywords latticespacingeffectsphysicalresultsspectrumsplittingsabsence
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We present results for the spectrum of b-bbar bound states in the quenched approximation for three different values of the lattice spacing, in the range 0.05fm to 0.15fm. We find our results for spin-independent splittings in physical units to be independent of the lattice spacing, indicating the absence of systematic errors from discretisation effects. Spin-dependent splittings are more sensitive to the lattice spacing and higher order corrections to the action; we discuss the size of these effects and what can be done to arrive at a physical result.

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