The $\Delta B=-\Delta Q$ transitions and $B_d\leftrightarrow {\bar{B}}_d$ oscillations

G. V. Dass, K. V. L. Sarma

We estimate the product of the relative strength of the $\Delta B=-\Delta Q$ amplitude in the decay $B_d^0\to D^{\ast }\ell {\bar{\nu }}_{\ell }$ and the width-difference parameter $y$. For…