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- W1993182020 abstract "By combining the first unquenched lattice computation of the B-meson binding energy with the recently calculated two-loop contribution to the lattice HQET mass, we determine the $bar{MS}$ b-quark mass, $bar{m}_{b}(bar{m}_{b})$ at the NNLO. We find $bar{m}_{b}(bar{m}_{b}) = (4.26pm 0.03 pm 0.04 pm 0.05) {rm GeV}$. The inclusion of the two-loop effects is one of the steps necessary to extract $bar{m}_{b}(bar{m}_{b})$ with a precision better than ${cal O}(Lambda_{QCD})$, which is the uncertainty due to the presence of an IR renormalon singularity in the perturbative series of the residual mass. Our results have been obtained on a sample of 60 lattices of size $24^{3}times 40$ at $beta=5.6$, using the unquenched Wilson action with two degenerate sea quarks. The quark propagators have been computed using the unquenched links generated by the T$chi$L Collaboration." @default.
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- W1993182020 date "2000-04-01" @default.
- W1993182020 modified "2023-10-12" @default.
- W1993182020 title "NNLO unquenched calculation of the b quark mass" @default.
- W1993182020 cites W2020260414 @default.
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- W1993182020 doi "https://doi.org/10.1016/s0920-5632(00)91649-9" @default.
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