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

M. G. Olsson·S. Veseli
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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.

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M. G. Olsson, S. Veseli. 1997-01-31. On the bounds for the curvature and higher derivatives of the Isgur-Wise function. https://doi.org/10.1016/s0370-2693(97)00176-7

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