Tests of the fundamental symmetries in eta meson decays

Abstract

Patterns of chiral symmetry violation and tests of the conservation of the fundamental C, P and CP symmetries are key physics issues in studies of the pi0, eta and eta' meson decays. These tests include searches for rare or forbidden decays and searches for asymmetries among the decay products in the not-so-rare decays. Some examples for the rare decays are eta-->2pi, eta-->4pi0 (CP tests), decays into an odd number of photons (e.g., eta-->3g) and the decay eta-->pi0e+e- (C tests). The experimental studies of the pi0, eta and eta' meson decays are carried out at four European accelerator research facilities: KLOE/KLOE-2 at DAFNE (Frascati), Crystal Ball at MAMI (Mainz), WASA at COSY (Jülich), Crystal Barrel at ELSA (Bonn).

9 pages, 2 figures, proceedings of Symposium on Prospects in the Physics of Discrete Symmetries, DISCRETE 2010, 6 - 11 December, Rome; v2: added references

References in corpus (8)

• Study of the electromagnetic transition form-factors in η-> μ^+μ^-γand ω-> μ^+μ^-π^0 decays with NA60
• The WASA Detector Facility at CELSIUS
• Rare decay pi0 -> e+e-: theory confronts KTeV data
• Measurement of the Matrix Element for the Decay ${\eta }^{\prime }\to \eta {\pi }^{+}{\pi }^{-}$
• Complete structure dependent analysis of the decay $P\to l^{+}{l}^{-}$
• On mass corrections to the decays P \to l^+l^-
• $\eta$ and ${\eta }^{\prime }$ Physics at BES-III
• Nucleon EDM and rare decays of eta mesons

Cited by in corpus (5)

• Precision tests of fundamental physics with $\eta$ and ${\eta }^{\prime }$ mesons
• Anomalous decays of eta' and eta into four pions
• Search for $C$ violation in the decay $\eta \to {\pi }^0+e^{+}+e^{-}$ with WASA-at-COSY
• Measurement of the absolute branching fractions of Jpsi to gamma eta and eta decay modes
• Study of the ${\eta }^{\prime }$ $\to$ $V{e}^{+}{e}^{-}$ decay with hidden local symmetry model