Near threshold kaon-kaon interaction in the reactions e+e−→K+K−γ${e^ + }{e^ - } \to {K^ + }{K^ - }\gamma$ and e+e−→K0K¯0γ${e^ + }{e^ - } \to {K^0}{\bar K^0}\gamma$

Strong interactions between pairs of the K+K− and K0K¯0${K^0}{\bar K^0}$ mesons can be studied in radiative decays of ϕ(1020) mesons. We present a theoretical model of the reactions e+e−→ϕ→K+K−γ${e^ + }{e^ - } \to \phi \to {K^ + }{K^ - }\gamma$ and e+e−→ϕ→K0K¯0γ${e^ + }{e^ - } \to \phi \to {K^0}{\bar K^0}\gamma$. The K+K− and K0K¯0${K^0}{\bar K^0}$ effective mass dependence of the differential cross sections is derived. The total cross sections and the branching fractions for the two radiative ϕ decays are calculated.