Measurements of Branching Ratios for $eta$ Decays into Charged Particles

The WASA-at-COSY experiment has collected $3times10^{7}$ events with $eta$-mesons produced via the reaction $pdrightarrow{^{3}textrm{He}}eta$ at $textrm{T} = 1.0 textrm{GeV}$. Using this data set, we evaluate the branching ratios of the decays $etatopi^{+}pi^{-}gamma$, $etato e^{+}e^{-}gamma$, $etatopi^{+}pi^{-}e^{+}e^{-}$ and $etato e^{+}e^{-}e^{+}e^{-}$. The branching ratios are normalized to the $etarightarrowpi^{+}pi^{-}pi^{0}$ decay. In addition an upper limit on a $CP$-violating asymmetry in $etarightarrow pi^{+}pi^{-}e^{+}e^{-}$ is extracted.