Search for the C-violating meson decay η → π0e+e− with WASA-at-COSY Kay Demmich, Florian Bergmann, Nils Hüsken and Alfons Khoukaz EPJ Web Conf., 130 (2016) 03001 Published online: 29 November 2016 DOI: 10.1051/epjconf/201613003001