Sensitivity targets for dark photon searches in charged kaon decays

M. Fabbrichesi, E. Gabrielli, K. Müürsepp

We investigate the prospects for detecting invisible dark photons in charged kaon decays through the two-pion channel $K^{+}\to {\pi }^{+}{\pi }^0{\gamma }_D$ and the one-pion radiative decay $K^+\toπ^…