New precise measurements of radiative charged kaon and hyperon decays

Abstract

New results in the radiative decay of charged kaons sector are presented by the NA48/2 experiment at CERN: the first measurement of the DE and INT contribution to the decay $K^{\pm} \rightarrow \pi^{\pm}\pi^{0}\gamma$ in the $T^{∗}_{\pi}$ region $0 < T^{∗}_{\pi} < 80$ Mev and the first observation of $K^{\pm} \rightarrow \pi^{\pm}e^{+}e^{-}\gamma$ decay. Also new results in the radiative decay of hyperons are presented by NA48/1: the measurement of $\Xi^{0} \rightarrow \Lambda\gamma$ decay asymmetry and the first observation of the $\Xi^{0} \rightarrow \Lambda e^{+}e^{−}$ decay