On the bounds for the curvature and higher derivatives of the Isgur-Wise function

Abstract

We discuss constraints imposed on the zero-recoil curvature and higher derivatives of the Isgur-Wise function by a general quark model. These constraints are expressed as bounds for a given slope parameter, and compared with those based upon analyticity properties of QCD spectral functions. Our results also indicate that in the analysis of the experimental data for semileptonic $B\rar D^{(*)}$ decays it may be important to include at least the third term in the form factor expansion about the zero recoil point.

14 pages, latex, uses epsf macro, 5 postscript figures included

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• Semileptonic Meson Decays in the Quark Model: An Update
• Model-Independent Extraction of |V_{cb}| Using Dispersion Relations
• Improved Bounds for the Slope and Curvature of $\bar{B}\to D^{(\ast )}\ell \bar{\nu }$ Form Factors
• Relativistic Flux Tube Model Calculation of the Isgur-Wise Function
• Sum rules, Regge trajectories, and relativistic quark models
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• Modelling form factors in HQET

Cited by in corpus (1)

• Semileptonic form factors - a model-independent approach