Study of the Form Factors of the Decay B→Dlν in the Lattice Regime

I studied the decay rate of the particle decay $B \rightarrow D l \nu_l$ using data collected from the Belle Collaboration. In order to analyze this decay rate, I used two different form factor parametrizations, CLN (Caprini, Lellouch, and Neubert) and BGL (Boyd, Grinstein, and Lebed). I was able to fit these form factors to the data collected by the Belle collaboration to determine the free parameters $\mathcal{G}(1)$ and $\rho^2$. And the goal of my project was to fit these form factors in only lattice regime, taking only the data points where the recoil variable $w <$ $\sim 1.3$, which corresponds to the lower energy portion of the full data set. The purpose of this is to determine how many data points I need to get a good fit for the free parameters, but few enough data points that I am still in the low energy regime.