The polarization effects of the process $\tau \rightarrow K^{-} \pi^{0}   \nu_{\tau}$ in the Nambu--Jona-Lasinio model
  The polarization effects of the processes $\tau \rightarrow K^{-} \pi^{0} \nu_{\tau}$ are described in the framework of the Nambu--Jona-Lasinio model. The intermediate vector meson $K^{*}(892)$ is taken into account. The contribution of these effects to the differential decay width is obtained. 
A. A. Pivovarov and O. V. Teryaev
hep-ph