Measurement of $\eta \to {\pi }^0\gamma \gamma$ branching fraction with the KLOE detector

D. Babusci, P. Beltrame, M. Berlowski +50

We present a measurement of the radiative decay $\eta \to {\pi }^0\gamma \gamma$ using 82 million $\eta$ mesons produced in $e^{+}{e}^{-}\to \varphi \to \eta \gamma$ process at the Frascati $\varphi$-factory DA$\Phi$NE. From the data ana…