Partial wave analysis of $J/\psi \to \gamma \eta^{\prime} \eta^{\prime}$
Abstract
Using a sample of (10.09±0.04)×109 J/ψ events collected with the BESIII detector, a partial wave analysis of J/ψ→γη′η′ is performed. The masses and widths of the observed resonances and their branching fractions are reported. The main contribution is from J/ψ→γf0(2020) with f0(2020)→η′η′, which is found with a significance of greater than 25σ. The product branching fraction B(J/ψ→γf0(2020))·B(f0(2020)→η′η′) is measured to be (2.63±0.06(stat.)-0.46+0.31(syst.))×10-4. NUMERICAL VALUES HAVE BEEN DIGITISED FROM THE PAPER.
Fields of Study & Subjects
Quantum Chromodynamics and Particle Interactions
Particle physics theoretical and experimental studies
Astrophysics and Cosmic Phenomena
Publication details
- Journal / source
- arXiv (Cornell University)
- Publication date
- 1 January 2026
- Language
- EN
- Document type
- Preprint