Model Independent Calculation of $\mathcal{B}({\bar{B}}^0\to D^{(\ast )+}{\tau }^{-}\bar{\nu })/\mathcal{B}({\bar{B}}^0\to D^{(\ast )+}{e}^{-}\bar{\nu })$

Dae Sung Hwang, Do-Won Kim

Using the formulas for the $d\Gamma /d{q}^2$ distribution with non-zero lepton mass and experimentally determined form factors, we calculate the $d\Gamma (D^{(\ast )+}{l}^{-}\bar{\nu })/d{q}^2$ spectra a…