Model-Independent Extraction of $\mathrm{\mid }{V}_{cb}\mathrm{\mid }$ from $\bar{B}\to D^{\ast }\mathrm{\ell }\bar{\nu }$

We fit the unfolded data of ${\bar{B}}^0\to D^{\ast +}\mathrm{\ell }\bar{\nu }$ from the Belle experiment, where $\mathrm{\ell }\equiv e,\mu$, using a method independent of heavy quark symmetry to extrapolate to zero-recoil and extract the value of $\mathrm{\mid }{V}_{cb}\mathrm{\mid }$. This results in $|V_{cb}| = (41.9^{~+2.0}_{~-1.9})\times 10^{-3}$, which is robust to changes in the theoretical inputs and very consistent with the value extracted from inclusive semileptonic $B$ decays.