$B$ decays to radially excited $D$ mesons in Heavy Quark Effective Theory

Damir Bečirević, Alain Le Yaouanc, Luis Oliver

Semileptonic transitions $\overline{B}\to D^{(n)}\ell \overline{\nu }$, where $D^{(n)}(n\ne 0)$ is a radially excited meson, have recently attracted much attention as a way to un…