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Rare CP-violated η and η′ meson decays and neutron EDM

Alexey S. Zhevlakov, Mikhail Gorchtein, Astrid N. Hiller Blin, Valery E. Lyubovitskij, V.A. Matveev, V.E. Volkova, V.A. Rubakov, D.G. Levkov, Y.V. Zhezher
2018 EPJ Web of Conferences  
The data for the upper limit on the electric dipole moment of the neutron (nEDM) can be explained by using different mechanisms beyond the Standard Model (SM). The nEDM can be generated by a CP-violating transition of η and η mesons into pion pairs. We derive the upper limits for the rates of the CP-violating decays η(η ) → 2π are by orders of magnitude more stringent than those from existing experiments so far. *
doi:10.1051/epjconf/201819102003 fatcat:d43sylourfa5vj4zo5eoblvwjq