Improved measurements of branching fractions for ηc →φφ and ωφ

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DOI Доступ к ресурсу на сайте издателя			10.1103/PhysRevD.95.092004

Title: Improved measurements of branching fractions for ηc →φφ and ωφ
Creator: Ablikim, M.
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Ai, X. C.
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Chelkov, G. A.
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Achasov, M. N.
Date: 2017
DOI: 10.1103/PhysRevD.95.092004
Description: Using ð223.7 1.4Þ × 106 J=ψ events accumulated with the BESIII detector, we study ηc decays to ϕϕ and ωϕ final states. The branching fraction of ηc → ϕϕ is measured to be Brðηc → ϕϕÞ ¼ ð2.5 0.3þ0.3 −0.7 0.6Þ × 10−3, where the first uncertainty is statistical, the second is systematic, and the third is from the uncertainty of BrðJ=ψ → γηcÞ. No significant signal for the double Okubo-Zweig-Iizuka suppressed decay of ηc → ωϕ is observed, and the upper limit on the branching fraction is determined to be Brðηc → ωϕÞ < 2.5 × 10−4 at the 90% confidence level.

Created: 03-10-2017

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