Testing the standard model with $D_{(s)}\to K_1(\to K\pi \pi )\gamma$ decays

Nico Adolph, Gudrun Hiller, Andrey Tayduganov

The photon polarization in $D_{(s)}\to K_1(\to K\pi \pi )\gamma$ decays can be extracted from an up-down asymmetry in the $K\pi \pi$ system, along the lines of the method known to $B \to K_1 (…