CP-violating decays of the pseudoscalars eta and eta' and their connection to the electric dipole moment of the neutron

Abstract

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 eta(eta') to the nucleon. Using this result, we then derive constraints on the CP-violating eta(eta')-pi-pi couplings, which define the two-pion CP-violating decays of the eta and eta' mesons. Our results are relevant for the running and planned measurements of rare decays of the eta and eta' mesons by the GlueX Collaboration at JLab and the LHCb Collaboration at CERN.

References in corpus (6)

• Electromagnetic excitation of the Delta(1232)-resonance
• A global fit to determine the pseudoscalar mixing angle and the gluonium content of the eta' meson
• Octet-baryon axial-vector charges and SU(3)-breaking effects in the semileptonic hyperon decays
• Implications of R-parity violating supersymmetry for atomic and hadronic EDMs
• Hadronic electric dipole moments in R-parity violating supersymmetry
• Search for the $CP$-violating strong decays $\eta \to {\pi }^{+}{\pi }^{-}$ and ${\eta }^{\prime }(958)\to {\pi }^{+}{\pi }^{-}$

Cited by in corpus (11)

• Precision tests of fundamental physics with $\eta$ and ${\eta }^{\prime }$ mesons
• Structure and decays of hidden heavy pentaquarks
• Implication of the hidden sub-GeV bosons for the $(g-2{)}_{\mu }$, ${}^8$Be-${}^4$He anomaly, proton charge radius, EDM of fermions and dark axion portal
• Implication of the dark axion portal for the EDM of fermions and dark matter probing with NA64$e$, NA64$\mu$, LDMX, $\mbox{M}^3$, and BaBar
• Lepton Phenomenology of Stueckelberg Portal to Dark Sector
• Patterns of $C$- and $CP$-violation in hadronic $\eta$ and ${\eta }^{\prime }$ three-body decays
• Updated limits on the CP violating $\eta \pi \pi$ and ${\eta }^{\prime }\pi \pi$ couplings derived from the neutron EDM
• Deuteron EDM induced by CP violating couplings of pseudoscalar mesons
• Dark SU(2) Stueckelberg portal
• Static electric dipole moment of the francium atom induced by axionlike particle exchange
• Upper limit on the $\eta \to {\pi }^{+}{\pi }^{-}$ branching fraction with the KLOE experiment