A one parameter representation for the Isgur-Wise function

We use a 1S lattice QCD heavy-light wavefunction to generate a single parameter, model independent description of the Isgur-Wise function. Using recent data we find the zero-recoil slope to be ξ′(1) = −1.16±0.17, while the second derivative turns out to be ξ″(1) = 2.64 ± 0.74.