Bottomonium from NRQCD with Dynamical Wilson Fermions

Details Bottomonium from NRQCD with Dynamical Wilson Fermions Bottomonium from NRQCD with Dynamical Wilson Fermions

1997-09-29

arxiv.org/abs/hep-lat/9709138v1

Nucl.Phys.Proc.Suppl. 63 (1998) 317-319

Physics

High Energy Physics

High Energy Physics - Lattice

Talk presented at LATTICE'97, 3 pages, Latex

Scientific paper

10.1016/S0920-5632(97)00756-1

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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