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Bottomonium from NRQCD with Dynamical Wilson Fermions

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arxiv hep-lat/9709138 v1 pith:JLXZILUS submitted 1997-09-29 hep-lat

Bottomonium from NRQCD with Dynamical Wilson Fermions

classification hep-lat
keywords dynamicalresultsactioncomparedfermionslatticequenchedwilson
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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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