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• W2012382427 abstract "We present a lattice calculation of the ${B}_{s}ensuremath{-}{B}_{s}$ transition-matrix element through a four-quark operator ${mathcal{O}}_{S}$ = $overline{b}(1ensuremath{-}{ensuremath{gamma}}_{5})soverline{b}(1ensuremath{-}{ensuremath{gamma}}_{5})s,$ which gives a leading contribution in the calculation of the width difference $ensuremath{Delta}{ensuremath{Gamma}}_{s}$ in the ${1/m}_{b}$ expansion. The nonrelativistic QCD formulation is used to describe b quark on the lattice. Using the next-to-leading formula of Beneke et al., we obtain $(ensuremath{Delta}ensuremath{Gamma}/ensuremath{Gamma}{)}_{s}=0.151(37)(45)(17),$ where the first error reflects the uncertainty of the ${B}_{s}$ meson decay constant, the second error comes from our calculation of the matrix element of ${mathcal{O}}_{S},$ and the third represents an unknown ${1/m}_{b}$ correction." @default.
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• W2012382427 date "2000-07-10" @default.
• W2012382427 modified "2023-09-24" @default.
• W2012382427 title "Width difference in theBs−Bssystem with lattice nonrelativistic QCD" @default.
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• W2012382427 doi "https://doi.org/10.1103/physrevd.62.034504" @default.
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