We report the first observation of the two-body baryonic decays B+ → Σc(2455)++¯Ξc− and B0 → Σc(2455)0¯Ξ0c with significances of 7.3σ and 6.2σ, respectively, including statistical and systematic uncertainties. The branching fractions are measured to be B(B+ → Σc(2455)++¯Ξ−c) =(5.74 ± 1.11 ± 0.42+2.47−1.53)× 10−4 and B(B0 → Σc(2455)0¯Ξ0c) = (4.83 ± 1.12 ± 0.37+0.72−0.60) × 10−4. The first and second uncertainties are statistical and systematic, respectively, while the third ones arise from the absolute branching fractions of ¯Ξ−c or ¯Ξ0c decays. The data samples used for this analysis have integrated luminosities of 711 fb−1 and 365 fb−1, and were collected at the ϒ(4S) resonance by the Belle and Belle II detectors operating at the KEKB and SuperKEKB asymmetric-energy e+e− colliders, respectively.
Abumusabh, M., Adachi, I., Aggarwal, L., Ahmed, H., Ahn, Y., Aihara, H., et al. (2025). Observation of the decays B + → Σ c ( 2455 ) + + Ξ ¯ c − and B 0 → Σ c ( 2455 ) 0 Ξ ¯ c 0. PHYSICAL REVIEW D, 112(5), L051101-1-L051101-9 [10.1103/2fhj-8vyx].
Observation of the decays B + → Σ c ( 2455 ) + + Ξ ¯ c − and B 0 → Σ c ( 2455 ) 0 Ξ ¯ c 0
Branchini, P.Membro del Collaboration Group
;Budano, A.Membro del Collaboration Group
;Bussino, S.Membro del Collaboration Group
;De Pietro, G.Membro del Collaboration Group
;Laurenza, M.Membro del Collaboration Group
;Martellini, C.Membro del Collaboration Group
;
2025-01-01
Abstract
We report the first observation of the two-body baryonic decays B+ → Σc(2455)++¯Ξc− and B0 → Σc(2455)0¯Ξ0c with significances of 7.3σ and 6.2σ, respectively, including statistical and systematic uncertainties. The branching fractions are measured to be B(B+ → Σc(2455)++¯Ξ−c) =(5.74 ± 1.11 ± 0.42+2.47−1.53)× 10−4 and B(B0 → Σc(2455)0¯Ξ0c) = (4.83 ± 1.12 ± 0.37+0.72−0.60) × 10−4. The first and second uncertainties are statistical and systematic, respectively, while the third ones arise from the absolute branching fractions of ¯Ξ−c or ¯Ξ0c decays. The data samples used for this analysis have integrated luminosities of 711 fb−1 and 365 fb−1, and were collected at the ϒ(4S) resonance by the Belle and Belle II detectors operating at the KEKB and SuperKEKB asymmetric-energy e+e− colliders, respectively.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
