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Asymptotics of the perturbative series for f_{B^*}/f_B

F. Campanario·A. G. Grozin·T. Mannel
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Abstract

We investigate the structure of the leading IR renormalon singularity in the QCD/HQET matching coefficients for heavy-light quark currents beyond the large-β_0 limit. From this result, we derive the large-order behaviour of the perturbative series for these coefficients, and for ratios of meson matrix elements, such as f_{B^*}/f_B.

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F. Campanario, A. G. Grozin, T. Mannel. 2003-07-25. Asymptotics of the perturbative series for f_{B^*}/f_B. https://doi.org/10.1016/s0550-3213(03)00354-7

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