Volume 364 - European Physical Society Conference on High Energy Physics (EPS-HEP2019) - QCD and Hadronic Physics
The KLOE-2 experiment has completed its data-taking campaign at the $e^+e^-$ DA$\Phi$NE collider in Frascati, achieving the integrated luminosity goal of more than 5 fb$^{-1}$ at the $\phi$-meson peak. This new data sample, together with the KLOE data, corresponds to $2.4\times10^{10}$ $\phi$ and $3.1\times10^8$ $\eta$ meson decays, which supports plenty of precision measurements. This report presents the recent results and status of the low-energy hadron physics from KLOE/KLOE-2 experiments, including the search for the $P$- and $CP$-violating process $\eta\to\pi^+\pi^-$ obtaining the most stringent upper limit on the branching fraction, the study of the ChPT golden mode $\eta\to\pi^0\gamma\gamma$, the hypothetical $B$-boson searches in the decays $\phi\to\eta B$ and $\phi\to\eta(B\gamma)\gamma$, with $B\to\pi^0\gamma$, and the $\gamma\gamma$ interactions at KLOE-2 with the new installed taggers.