CP -violating decays of the pseudoscalars η and η′ and their connection to the electric dipole moment of the neutron

Thomas Gutsche, Astrid N. Hiller Blin, Sergey Kovalenko, Serguei Kuleshov, Valery E. Lyubovitskij, Manuel J. Vicente Vacas, Alexey Zhevlakov

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Using the present upper bound on the neutron electric dipole moment, we give an estimate for the upper limit of the CP-violating couplings of the η(η′) to the nucleon. Using this result, we then derive constraints on the CP-violating η(η′)ππ couplings, which define the two-pion CP-violating decays of the η and η′ mesons. Our results are relevant for the running and planned measurements of rare decays of the η and η′ mesons by the GlueX Collaboration at JLab and the LHCb Collaboration at CERN.

Original languageEnglish
Article number036022
JournalPhysical Review D
Issue number3
Publication statusPublished - 28 Feb 2017


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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