Using (223.7±1.4)x10^6 J/psi events accumulated with the BESIII detector, we study eta_c decays to phi phi and phi omega final states. The branching fraction of eta_c --> phi phi is measured to be Br(eta_c --> phi phi)=(2.5±0.3-0.7+0.3±0.6)x10^-3, where the first uncertainty is statistical, the second is systematic, and the third is from the uncertainty of Br(J/psi --> gamma eta_c). No significant signal for the double Okubo-Zweig-Iizuka suppressed decay of eta_c --> omega phi† is observed, and the upper limit on the branching fraction is determined to be Br(eta_c --> omega phi†)<2.5x10^-4 at the 90% confidence level.

Improved measurements of branching fractions for eta_c-->†phi phi and omega phi

FARINELLI, Riccardo;GARZIA, Isabella;
2017

Abstract

Using (223.7±1.4)x10^6 J/psi events accumulated with the BESIII detector, we study eta_c decays to phi phi and phi omega final states. The branching fraction of eta_c --> phi phi is measured to be Br(eta_c --> phi phi)=(2.5±0.3-0.7+0.3±0.6)x10^-3, where the first uncertainty is statistical, the second is systematic, and the third is from the uncertainty of Br(J/psi --> gamma eta_c). No significant signal for the double Okubo-Zweig-Iizuka suppressed decay of eta_c --> omega phi† is observed, and the upper limit on the branching fraction is determined to be Br(eta_c --> omega phi†)<2.5x10^-4 at the 90% confidence level.
2017
Ablikim, M.; Achasov, M. N.; Ai, X. C.; Albayrak, O.; Albrecht, M.; Ambrose, D. J.; Amoroso, A.; An, F. F.; An, Q.; Bai, J. Z.; Baldini Ferroli, R.; B...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2374746
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