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.

Search for the rare decay η′ →π0π0π0π0 at BESIII

Alekseev M.;Amoroso A.;Bianchi F.;Destefanis M.;De Mori F.;Greco M.;Lavezzi L.;Maggiora M.;Marcello S.;Sosio S.;Spataro S.;
2020-01-01

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.
2020
Inglese
Esperti anonimi
101
3
032001-1
032001-8
8
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262
481
Ablikim M.; Achasov M.N.; Adlarson P.; Ahmed S.; Albrecht M.; Alekseev M.; Amoroso A.; An Q.; Anita Y.B.; Bakina O.; Ferroli R.B.; Balossino I.; Ban Y...espandi
info:eu-repo/semantics/article
open
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1796362
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