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 — preprints:2002:ttp02-11 [2016/03/17 11:03] (current) Line 1: Line 1: + ====== TTP02-11 Asymptotics of the Perturbative Series for $f_{B^*} /f_B$ ====== + + + 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. + + |**F. Campanario, A. G. Grozin, T. Mannel**  | + |**  Nucl.Phys.   B663 280-318 2003  **  | + | {{preprints:2002:ttp02-11.pdf|PDF}} {{preprints:2002:ttp02-11.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/0303052|arXiv]]   | + | |