Asymptotics of the perturbative series for f_{B^*}/f_B
classification
✦ hep-ph
keywords
coefficientsperturbativeseriesasymptoticsbehaviourbetabeyondcurrents
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We investigate the structure of the leading IR renormalon singularity in the QCD/HQET matching coefficients for heavy-light quark currents beyond the large-\beta_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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