Abstract
We present a method for parametrizing heavy meson semileptonic 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* lν form factors, and extract |Vcb| = 0.037-0.002+0.003 from experimental data w least squares fit. Our method eliminates model-dependent uncertainties inherent in choosing a parametrization for the extrapolation of the differential decay rate to threshold. The method also allows a description of B → Dlν form factors accurate to 1% in terms of two parameters.
Original language | English (US) |
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Pages (from-to) | 306-312 |
Number of pages | 7 |
Journal | Physics Letters B |
Volume | 353 |
Issue number | 2-3 |
DOIs | |
State | Published - Jun 29 1995 |
Externally published | Yes |
ASJC Scopus subject areas
- Nuclear and High Energy Physics