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

BESIII Collaboration; Kolcu, Onur Buğra

Göster/Aç

Erişim

info:eu-repo/semantics/openAccessAttribution-NoDerivs 3.0 United Stateshttp://creativecommons.org/licenses/by-nd/3.0/us/

Tarih

2020

Yazar

BESIII Collaboration
Kolcu, Onur Buğra

Üst veri

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Künye

Ablikim, M., Achasov, M. N., Adlarson, P., Ahmed, S., Albrecht, M., Alekseev, M., . . . Collaboration, B. (2020). Search for the rare decay eta ' -> pi(0)pi(0)pi(0)pi(0) at BESIII. Physical Review D, 101(3), 8. doi:10.1103/PhysRevD.101.032001

Özet

Using a sample of 1.31 x 10(9) J/psi events collected with the BESIII detector, we perform a search for the rare decay if eta' -> 4 pi(0) via J/psi -> gamma eta'. No significant eta' signal is observed in the 4 pi(0) invariant mass spectrum. With a Bayesian approach, the upper limit on the branching fraction is determined to be B(eta' -> 4 pi(0)) < 4.94 x 10(-5) at the 90% confidence level, which is a factor of 6 smaller than the previous experimental limit.