Using data samples of (10087 ± 44) × 106 J/ψ events and (2712.4 ± 14.3) × 106 ψ(3686) events collected with the BESIII detector at the BEPCII collider, we search for the CP violating decays J/ψ → K0SK0S and ψ(3686) → K0SK0S. No significant signals are observed over the expected background yields. The upper limits on their branching fractions are set as B(J/ψ → K0SK0S) < 4.7 × 10−9 and B(ψ(3686) → K0SK0S) < 1.1 × 10−8 at the 90% confidence level. These results improve the previous limits by a factor of three for J/ψ → K0SK0S and two orders of magnitude for ψ(3686) → K0SK0S.

Search for J/ψ → K0SK0S and ψ(3686) → K0SK0S

Garzia, I.;Melendi, F.  M.;
2025

Abstract

Using data samples of (10087 ± 44) × 106 J/ψ events and (2712.4 ± 14.3) × 106 ψ(3686) events collected with the BESIII detector at the BEPCII collider, we search for the CP violating decays J/ψ → K0SK0S and ψ(3686) → K0SK0S. No significant signals are observed over the expected background yields. The upper limits on their branching fractions are set as B(J/ψ → K0SK0S) < 4.7 × 10−9 and B(ψ(3686) → K0SK0S) < 1.1 × 10−8 at the 90% confidence level. These results improve the previous limits by a factor of three for J/ψ → K0SK0S and two orders of magnitude for ψ(3686) → K0SK0S.
2025
Ablikim, M.; Achasov, M.  n.; Adlarson, P.; Ai, X.  c.; Aliberti, R.; Amoroso, A.; An, Q.; Bai, Y.; Bakina, O.; Ban, Y.; Bao, H. -R.; Batozskaya, V.; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2610571
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