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

Mar, 2003
45 pages
Published in:
  • Nucl.Phys.B 663 (2003) 280-318,
  • Nucl.Phys.B 670 (2003) 331-332 (erratum)
e-Print:
Report number:
  • TTP02-11,
  • SFB-CPP-03-03

Citations per year

20032008201320182023210
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-\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.
Note:
  • 45 pages, 2 eps figures. v2: small corrections, reference added. v3: reference added. v4: errors in some equations of Appendix B, in (5.8) and Table 2 corrected, numerical changes are very small. Paper also available from http://www-ttp.physik.uni-karlsruhe.de/Preprints/ Report-no: TTP02-11 Journal-ref: Nucl.Phys. B663 (2003) 280-318
  • 12.38.Cy
  • 12.39.Hg
  • Heavy quark effective theory
  • Renormalons
  • quantum chromodynamics
  • HQET model
  • renormalization: renormalon
  • singularity
  • quark: current
  • expansion: mass