Abstract
Using a sample of 4.48×108 ψ(3686) events collected with the BESIII detector at the BEPCII collider, we study the two-photon decays of the pseudoscalar mesons π0, η, η′, η(1405), η(1475), η(1760), and X(1835) in J/ψ radiative decays using ψ(3686)→π+π-J/ψ events. The π0, η, and η′ mesons are clearly observed in the two-photon mass spectra, and the branching fractions are determined to be B(J/ψ→γπ0→3γ)=(3.57±0.12±0.16)×10-5, B(J/ψ→γη→3γ)=(4.42±0.04±0.18)×10-4, and B(J/ψ→γη′→3γ)=(1.26±0.02±0.05)×10-4, where the first error is statistical and the second is systematic. No clear signal for η(1405), η(1475), η(1760) or X(1835) is observed in the two-photon mass spectra, and upper limits at the 90% confidence level on the product branching fractions are obtained.
| Original language | English (US) |
|---|---|
| Article number | 074013 |
| Journal | Physical Review D |
| Volume | 97 |
| Issue number | 7 |
| DOIs | |
| State | Published - Apr 1 2018 |
Bibliographical note
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