Near threshold kaon-kaon interaction in the reactions e+e−→K+K−γ and e+e−→K0K ̄0γ

e+e− → K+K−γ and e+e− → K0K̄0γ L. Leśniak1,∗, F. Sobczuk1, M. Silarski1, and F. Morawski1 1Institute of Physics, Jagiellonian University, Cracow, Poland Abstract. Strong interactions between pairs of the K+K− and K0K̄0 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 and e+e− → φ → K0K̄0γ. The K+K− and K0K̄0 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.