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Spectator effects in the HQET renormalization group improved Lagrangian at $\mathcal{O}(1/m^3)$ with leading logarithmic accuracy: Spin-dependent case

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arxiv 1806.09323 v1 pith:NWYWBXQD submitted 2018-06-25 hep-ph

classification hep-ph
keywords lagrangianaccuracyeffectsgroupimprovedleadinglogarithmicmathcal
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

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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