2004/02/29 by The KLOE Collaboration, F. Ambrosino, A. Aloisio +96 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1016/j.physletb.2004.04.012
published as Phys.Lett.B591:49-54,2004 · 8 pages, 5 figures Systematic study refined, some figures reordered
openalex publication_date 2004/05/12 · arxiv created 2004/06/08 · arxiv updated 2009/12/01 · openalex created_date 2017/06/05 · openalex updated_date 2026/07/28
We have searched for the C-violating decay η→γγγ in a sample of ∼18 million η mesons produced in φ→ηγ decays, collected with the KLOE detector at the Frascati φ-factory DAΦNE. No signal is observed and we obtain the upper limit BR(η→γγγ)⩽1.6×10−5 at 90% CL.