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- W2963700903 abstract "We consider the Lagrange density of non-relativistic Quantum Chromodynamics expanded up to order $1/m^2$, where $m$ is the heavy quark mass, and compute several matching coefficients up to two-loop order. Our results are building blocks for next-to-next-to-next-to-leading logarithmic and next-to-next-to-next-to-next-to-leading order corrections to the threshold production of top quark pairs and the decay of heavy quarkonia. We describe the techniques used for the calculation and provide analytic results for a general covariant gauge." @default.
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- W2963700903 date "2019-09-16" @default.
- W2963700903 modified "2023-09-25" @default.
- W2963700903 title "Matching coefficients in nonrelativistic QCD to two-loop accuracy" @default.
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- W2963700903 doi "https://doi.org/10.1103/physrevd.100.054016" @default.
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