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→KS0KS0 and ψ(3686)→KS0KS0

Amoroso, A.;Bianchi, F.;Destefanis, M.;De Mori, F.;Greco, M.;Maggiora, M.;Marcello, S.;Sosio, S.;Spataro, S.;
2025-01-01

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
112
5
052010-1
052010-10
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.; Beg...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/2118038
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