%0 Journal Article
%T Bottomonium from NRQCD with Dynamical Wilson Fermions
%A A. Spitz
%A N. Eicker
%A J. Fingberg
%A S. G¨šsken
%A H. Hoeber
%A Th. Lippert
%A K. Schilling
%A J. Viehoff
%J Physics
%D 1997
%I arXiv
%R 10.1016/S0920-5632(97)00756-1
%X 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.
%U http://arxiv.org/abs/hep-lat/9709138v1