https://doi.org/10.1051/epjconf/201819102003
Rare CP-violated η and η′ meson decays and neutron EDM.
1
Department of Physics, Tomsk State University, 634050 Tomsk, Russia
2
Matrosov Institute for System Dynamics and Control Theory SB RAS Lermontov str., 134, 664033, Irkutsk, Russia
3
Institut für Kernphysik, Johannes Gutenberg-Universität, Mainz, Germany and PRISMA Cluster of Excellence, Johannes Gutenberg-Universität, Mainz, Germany
4
Institut für Theoretische Physik, Universität Tübingen, Kepler Center for Astro and Particle Physics, Auf der Morgenstelle 14, D-72076 Tübingen, Germany
5
Departamento de Física y Centro Científico Tecnológico de Valparaíso-CCTVal, Universidad Técnica Federico Santa María, Casilla 110-V, Valparaíso, Chile
* e-mail: zhevlakov@phys.tsu.ru
Published online: 31 October 2018
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.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
