We report the first observation of the two-body baryonic decays 𝐵+ →Σ𝑐⁢(2455)++⁢ ¯ Ξ − 𝑐 and 𝐵0 →Σ𝑐⁢(2455)0⁢ ¯ Ξ 0 𝑐 with significances of 7.3⁢𝜎 and 6.2⁢𝜎, respectively, including statistical and systematic uncertainties. The branching fractions are measured to be ℬ⁡(𝐵+ →Σ𝑐⁢(2455)++⁢ ¯ Ξ − 𝑐) =(5.74 ±1.11 ±0.4⁢2+2.47 −1.53) ×10−4 and ℬ⁡(𝐵0 →Σ𝑐⁢(2455)0⁢ ¯ Ξ 0 𝑐) =(4.83 ±1.12 ±0.3⁢7+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 ¯ Ξ 0 𝑐 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⁡(4⁢𝑆) resonance by the Belle and Belle II detectors operating at the KEKB and SuperKEKB asymmetric-energy 𝑒+⁢𝑒− colliders, respectively.

Observation of the decays 𝐵+ →Σ𝑐⁢(2455)++⁢¯Ξ−𝑐 and 𝐵0 →Σ𝑐⁢(2455)0⁢¯Ξ0𝑐

Bertacchi, V.;Bettarini, S.;Casarosa, G.;Corona, L.;Forti, F.;Lueck, T.;Massaccesi, L.;Mondal, S.;Moneta, S.;Rizzo, G.;Tenchini, F.;Trantou, F. F.;Zani, L.;
2025-01-01

Abstract

We report the first observation of the two-body baryonic decays 𝐵+ →Σ𝑐⁢(2455)++⁢ ¯ Ξ − 𝑐 and 𝐵0 →Σ𝑐⁢(2455)0⁢ ¯ Ξ 0 𝑐 with significances of 7.3⁢𝜎 and 6.2⁢𝜎, respectively, including statistical and systematic uncertainties. The branching fractions are measured to be ℬ⁡(𝐵+ →Σ𝑐⁢(2455)++⁢ ¯ Ξ − 𝑐) =(5.74 ±1.11 ±0.4⁢2+2.47 −1.53) ×10−4 and ℬ⁡(𝐵0 →Σ𝑐⁢(2455)0⁢ ¯ Ξ 0 𝑐) =(4.83 ±1.12 ±0.3⁢7+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 ¯ Ξ 0 𝑐 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⁡(4⁢𝑆) resonance by the Belle and Belle II detectors operating at the KEKB and SuperKEKB asymmetric-energy 𝑒+⁢𝑒− colliders, respectively.
2025
Abumusabh, M.; Adachi, I.; Aggarwal, L.; Ahmed, H.; Ahn, Y.; Aihara, H.; Akopov, N.; Alghamdi, S.; Alhakami, M.; Aloisio, A.; Althubiti, N.; Amos, K.;...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/1330253
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