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29 March 2024
 
  » arxiv » hep-lat/9709138

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Bottomonium from NRQCD with Dynamical Wilson Fermions
A.Spitz ; N.Eicker ; J.Fingberg ; S.Güsken ; H.Hoeber ; Th.Lippert ; K.Schilling ; J.Viehoff ;
Date 29 Sep 1997
Journal Nucl.Phys.Proc.Suppl. 63 (1998) 317-319
Subject hep-lat
AffiliationSESAM-Collaboration; HLRZ/DESY and Wuppertal University
AbstractWe present results for the b ar 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.
Source arXiv, hep-lat/9709138
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