Memorino on the `1/2 vs. 3/2 Puzzle' in $\bar{B}\to l\bar{\nu }{X}_c$

I. I. Bigi, B. Blossier, A. Le Yaouanc +5

After the successes the OPE description has scored in describing $\bar{B}\to l\bar{\nu }{X}_c$ decays, we need to study what can be said about the composition of the hadronic final stat…