Muon transverse polarization in the K_(l2γ) decay in SM
classification
✦ hep-ph
keywords
muonpolarizationtransversegammaaveragedcalculatedcontributionsdecay
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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 $5.63 \times 10^{-4}$.
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