HQET chromomagnetic interaction at two loops
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We present the coefficient of the chromomagnetic interaction operator, the only unknown coefficient in the Heavy Quark Effective Theory (HQET) lagrangian up to the $1/m$ level, with the two-loop accuracy by matching scattering amplitudes of an on-shell heavy quark in an external field in full QCD and HQET, and obtain the two-loop anomalous dimension of this operator in HQET.
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Forward citations
Cited by 2 Pith papers
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The chromomagnetic moment of a heavy quark with hyperasymptotic precision
The normalization of the leading IR renormalon in the heavy quark chromomagnetic moment is fixed, enabling hyperasymptotic hyperfine splitting calculations for ground-state B and D mesons and yielding the fitted value...
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Renormalon-based resummation for B(D) Mesons
Renormalon resummation with a holomorphic timelike coupling yields estimates for b and c quark pole masses and related hadronic parameters from MS-bar inputs and known series coefficients.
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