Search for the decay η′ →γγη

BESIII Collaboration

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Using a data sample of 1.31×109 J/ψ events collected with the BESIII detector, a search for η′→γγη via J/ψ→γη′ is performed for the first time. No significant η′ signal is observed in the γγη invariant mass spectrum, and the branching fraction of η′→γγη is determined to be less than 1.33×10-4 at the 90% confidence level.

Original languageEnglish
Article number052015
Number of pages7
JournalPhysical Review D
Volume100
Issue number5
DOIs
Publication statusPublished - 30 Sep 2019

Keywords

  • CHIRAL PERTURBATION-THEORY

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