Scaling of the Upsilon Spectrum in Lattice NRQCD

Details Scaling of the Upsilon Spectrum in Lattice NRQCD Scaling of the Upsilon Spectrum in Lattice NRQCD

1998-02-18

arxiv.org/abs/hep-lat/9802024v2

Phys.Rev. D58 (1998) 054505

Physics

High Energy Physics

High Energy Physics - Lattice

35 pages, 7 figures. Minor changes. Version to be published in Phys.Rev.D

Scientific paper

10.1103/PhysRevD.58.054505

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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