Final state interactions in $D\to K\pi l\nu$ decay

Xian-Wei Kang, Hai-Bo Li, Gong-Ru Lu

The semileptonic $D_{l4}$ decay including $D\to K\pi l\nu$ and $D\to \pi \pi l\nu$ have been extensively studied. In these references, the form factors and differential decay rate are explicitl…