Braguta V.V., Likhoded A.A., Chalov A.E

 "Muon transverse polarization in the $K_{l2\gamma}$ decay in"


 hep-ph/0205203 


      Abstract
The muon transverse polarization in the $K^+ \to \mu^+ \nu \gamma$ process
induced by the electromagnetic final state interaction is calculated in the
framework of Standard Model. It is shown that one loop contributions lead to a
nonvanihing muon transverse polarization. The value of the muon transverse
polarization averaged over the kinematical region of $E_\gamma \geq 20$ MeV is
equal to $5.63 \times 10^{-4}$.