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arXiv · hep-lat/9709138

Bottomonium from NRQCD with Dynamical Wilson Fermions

A. Spitz·N. Eicker·J. Fingberg·S. Güsken·H. Hoeber·Th. Lippert·K. Schilling·J. Viehoff
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Abstract

We present results for the b \bar b spectrum obtained using an O(M_bv^6)-correct non-relativistic lattice QCD action. Propagators are evaluated on SESAM's three sets of dynamical gauge configurations generated with two flavours of Wilson fermions at beta = 5.6. Compared to a quenched simulation at equivalent lattice spacing we find better agreement of our dynamical data with experimental results in the spin-independent sector but observe no unquenching effects in hyperfine-splittings. To pin down the systematic errors we have also compared quenched results in different ``tadpole'' schemes and used a lower order action.

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A. Spitz, N. Eicker, J. Fingberg, S. Güsken, H. Hoeber, Th. Lippert, K. Schilling, J. Viehoff. 1997-09-29. Bottomonium from NRQCD with Dynamical Wilson Fermions. https://doi.org/10.1016/s0920-5632(97)00756-1

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