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Search for the rare decay eta ' -> pi(0)pi(0)pi(0)pi(0) at BESIII

Abstract:
Using a sample of 1.31×109 J/ψ events collected with the BESIII detector, we perform a search for the rare decay η′→4π0 via J/ψ→γη′. No significant η′ signal is observed in the 4π0 invariant mass spectrum. With a Bayesian approach, the upper limit on the branching fraction is determined to be B(η′→4π0)<4.94×10-5 at the 90% confidence level, which is a factor of 6 smaller than the previous experimental limit.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1103/PhysRevD.101.032001

Authors


Publisher:
American Physical Society
Journal:
Physical Review D More from this journal
Volume:
101
Issue:
3
Article number:
32001
Publication date:
2020-02-05
Acceptance date:
2020-01-06
DOI:
EISSN:
2470-0029
ISSN:
2470-0010
Language:
English
Keywords:
Pubs id:
1088042
Local pid:
pubs:1088042
Deposit date:
2020-04-23

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