Role of $\rho -\omega$ interference in semileptonic $B\to {\pi }^{+}{\pi }^{-}\ell {\bar{\nu }}_{\ell }$ decays

Florian U. Bernlochner, Stefan Wallner

It is long known that interference effects play an important role in understanding the shape of the ${\pi }^{+}{\pi }^{-}$ spectrum of resonances near the threshold. In this manuscript we invest…