Model-independent semi-leptonic form factors using dispersion relations

C. G. Boyd, B. Grinstein, R. F. Lebed

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


We present a method for parametrizing heavy-meson semi-leptonic form factors using dispersion relations, and from it produce a two-parameter description of the B → B elastic form factor. We use heavy-quark symmetry to relate this function to B → D*ℓv̄ form factors, and extract |Vcb| = 0.0355+0.0029-0.0025 from experimental data with a least-squares fit. Our method eliminates model-dependent uncertainties inherent in choosing a parametrization for the extrapolation of the differential decay rate to threshold.

Original languageEnglish (US)
Pages (from-to)863-872
Number of pages10
JournalNuovo Cimento della Societa Italiana di Fisica A
Issue number6
StatePublished - 1996
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Astronomy and Astrophysics


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