Abstract
We extend existing work on reparametrization invariance (RPI) of the heavy-quark expansion (HQE). RPI implies relations between different orders of the HQE. We discuss the total rates of inclusive processes and obtain results which have a manifest RPI and can be expressed through matrix elements of operators and states defined in full QCD. This approach leads to a partial re-summation of higher-order terms in the heavy-quark expansion. It has the advantage that for reparametrization-invariant observables it shows that the number of independent non-perturbative parameters can be reduced.
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ArXiv ePrint: 1802.09409
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Mannel, T., Vos, K.K. Reparametrization invariance and partial re-summations of the heavy quark expansion. J. High Energ. Phys. 2018, 115 (2018). https://doi.org/10.1007/JHEP06(2018)115
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DOI: https://doi.org/10.1007/JHEP06(2018)115