Using a sample of 448.1×106 ψ(2S) events collected with the BESIII detector, we perform a study of the decay J/ψ→K+K- via ψ(2S)→π+π-J/ψ. The branching fraction of J/ψ→K+K- is determined to be BK+K-=(3.072±0.023(stat)±0.050(syst))×10-4, which is consistent with previous measurements but with significantly improved precision.

Precision measurement of the branching fraction of J/ψ →k+K- via ψ (2S) →π+π-J/ψ

Garzia, I.;Gramigna, S.;
2024

Abstract

Using a sample of 448.1×106 ψ(2S) events collected with the BESIII detector, we perform a study of the decay J/ψ→K+K- via ψ(2S)→π+π-J/ψ. The branching fraction of J/ψ→K+K- is determined to be BK+K-=(3.072±0.023(stat)±0.050(syst))×10-4, which is consistent with previous measurements but with significantly improved precision.
2024
Ablikim, M.; Achasov, M.  N.; Adlarson, P.; Ai, X.  C.; Aliberti, R.; Amoroso, A.; An, M.  R.; An, Q.; Bai, Y.; Bakina, O.; Balossino, I.; Ban, Y.; Ba...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2569734
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