By analyzing (27.12 +/- 0.14) x 10(8) Psi(3686) events collected with the BESIII detector operating at the BEPCII collider, the decay processes X-cJ -> 3( K+ K- ) (J = 0, 1, 2) are observed for the first time with statistical significances of 8.2 sigma, 8.1 sigma, and 12.4 sigma, respectively. The product branching fractions of Psi(3686) -> gamma X-cJ , X-cJ -> 3( K+ K- ) are presented and the branching fractions of X-cJ -> 3( K+ K- ) decays are determined to be B-Xc0 -> 3( K+ K- ) = (10.7 +/- 1.8 +/- 1.1) x 10(-6), B-Xc1 -> 3( K+ K- ) = (4.2 +/- 0.9 +/- 0.5) x 10(-6), and B-Xc2 -> 3( K+ K- ) 1/4 (7.2 +/- 1.1 +/- 0.8) x 10(-6), where the first uncertainties are statistical and the second are systematic.
Observation of χcJ →3 (K+K-)
Amoroso, A.;Bianchi, F.;Destefanis, M.;De Mori, F.;Greco, M.;Maggiora, M.;Marcello, S.;Sosio, S.;Spataro, S.;
2024-01-01
Abstract
By analyzing (27.12 +/- 0.14) x 10(8) Psi(3686) events collected with the BESIII detector operating at the BEPCII collider, the decay processes X-cJ -> 3( K+ K- ) (J = 0, 1, 2) are observed for the first time with statistical significances of 8.2 sigma, 8.1 sigma, and 12.4 sigma, respectively. The product branching fractions of Psi(3686) -> gamma X-cJ , X-cJ -> 3( K+ K- ) are presented and the branching fractions of X-cJ -> 3( K+ K- ) decays are determined to be B-Xc0 -> 3( K+ K- ) = (10.7 +/- 1.8 +/- 1.1) x 10(-6), B-Xc1 -> 3( K+ K- ) = (4.2 +/- 0.9 +/- 0.5) x 10(-6), and B-Xc2 -> 3( K+ K- ) 1/4 (7.2 +/- 1.1 +/- 0.8) x 10(-6), where the first uncertainties are statistical and the second are systematic.File | Dimensione | Formato | |
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PhysRevD.109.072016.pdf
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