Spectator effects in the HQET renormalization group improved Lagrangian at mathcal{O}(1/m³) with leading logarithmic accuracy: Spin-dependent case
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hep-ph
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lagrangianaccuracyeffectsgroupimprovedleadinglogarithmicmathcal
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The present paper incorporates the effects induced by massless spectator quarks in the renormalization group improved Wilson coefficients associated to the ${\cal O}(1/m^3)$ spin-dependent heavy quark effective theory Lagrangian operators. The computation is carried out in Coulomb gauge with leading logarithmic precision. The result completes the Lagrangian to $\mathcal{O}(1/m^3)$ with that accuracy.
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