New NA48 results on kaon and hyperon decays

The NA48 Collaboration has obtained several new results on kaon and neutral hyperon decays. For hyperons we present new, very precise measurements on the $\Xi^{0}$ lifetime and the decay asymmetries of $\Xi^{0} \to \Lambda \gamma$ and $\Xi^{0} \to \Sigma^{0}\gamma$. On kaon decays, we report on the first observation of the interference term between inner bremsstrahlung and direct emission in $K^{\pm} \to \pi^{\pm}\pi^{0}\gamma$ and on a new, accurate measurement of the form factor slopes in the semileptonic decay $K_{L} \to \pi^{\pm}\mu^{\mp}\nu$.