Observation of the decays B⁺ → Σ_c(2455)⁺⁺ Ξ̅_c^′− and B⁰ → Σ_c(2455)⁰ Ξ̅_c^′0

@misc{belle2026observation,
  title = {{Observation of the decays $B^+ \to Σ_c(2455)^++ \barΞ_c^\prime-$ and $B^0 \to Σ_c(2455)^0 \barΞ_c^\prime0$}},
  author = {Belle and Belle II Collaborations and M. Abumusabh and A. Aggarwal and H. Ahmed and J. K. Ahn and Y. Ahn and M. Akdag and N. Akopov and S. Alghamdi and M. Alhakami and N. Althubiti and K. Amos and M. Angelsmark and N. Anh Ky and C. Antonioli and K. Arai and H. Atmacan and V. Aushev and R. Ayad and V. Babu and H. Bae and N. K. Baghel and S. Bahinipati and P. Bambade and Sw. Banerjee and M. Barrett and M. Bartl and J. Baudot and A. Beaubien and F. Becherer and J. Becker and G. F. Benfratello and J. V. Bennett and F. U. Bernlochner and V. Bertacchi and M. Bertemes and E. Bertholet and M. Bessner and S. Bettarini and V. Bhardwaj and B. Bhuyan and F. Bianchi and T. Bilka and D. Biswas and A. Bobrov and D. Bodrov and G. Bonvicini and J. Borah and A. Boschetti and A. Bozek and M. Bračko and P. Branchini and R. A. Briere and T. E. Browder and A. Budano and S. Bussino and Q. Campagna and M. Campajola and M. Carminati},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2606.12905},
  eprint = {2606.12905},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2606.12905},
  note = {CC BY 4.0},
}

TY  - UNPB
TI  - Observation of the decays B^+ → Σ_c(2455)^++ Ξ̅_c^′− and B^0 → Σ_c(2455)^0 Ξ̅_c^′0
AU  - Belle
AU  - Belle II Collaborations
AU  - M. Abumusabh
AU  - A. Aggarwal
AU  - H. Ahmed
AU  - J. K. Ahn
AU  - Y. Ahn
AU  - M. Akdag
AU  - N. Akopov
AU  - S. Alghamdi
AU  - M. Alhakami
AU  - N. Althubiti
AU  - K. Amos
AU  - M. Angelsmark
AU  - N. Anh Ky
AU  - C. Antonioli
AU  - K. Arai
AU  - H. Atmacan
AU  - V. Aushev
AU  - R. Ayad
AU  - V. Babu
AU  - H. Bae
AU  - N. K. Baghel
AU  - S. Bahinipati
AU  - P. Bambade
AU  - Sw. Banerjee
AU  - M. Barrett
AU  - M. Bartl
AU  - J. Baudot
AU  - A. Beaubien
AU  - F. Becherer
AU  - J. Becker
AU  - G. F. Benfratello
AU  - J. V. Bennett
AU  - F. U. Bernlochner
AU  - V. Bertacchi
AU  - M. Bertemes
AU  - E. Bertholet
AU  - M. Bessner
AU  - S. Bettarini
AU  - V. Bhardwaj
AU  - B. Bhuyan
AU  - F. Bianchi
AU  - T. Bilka
AU  - D. Biswas
AU  - A. Bobrov
AU  - D. Bodrov
AU  - G. Bonvicini
AU  - J. Borah
AU  - A. Boschetti
AU  - A. Bozek
AU  - M. Bračko
AU  - P. Branchini
AU  - R. A. Briere
AU  - T. E. Browder
AU  - A. Budano
AU  - S. Bussino
AU  - Q. Campagna
AU  - M. Campajola
AU  - M. Carminati
PY  - 2026
DA  - 2026/10/01
PB  - arXiv
DO  - 10.48550/arxiv.2606.12905
UR  - https://arxiv.org/abs/2606.12905
AB  - We report the first observation of the decays B^+ → Σ_c(2455)^++ Ξ̅_c^′− and B^0 → Σ_c(2455)^0 Ξ̅_c^′0, with significances of 6.4 σ and 5.3 σ, respectively, including systematic uncertainties. This analysis is based on data samples containing 771.6 × 10^6 Υ(4S) decays collected with the Belle detector at the KEKB collider and 520.6 × 10^6 Υ(4S) decays collected with the Belle~II detector at the SuperKEKB collider. The branching fractions are measured to be ℬ(B^+ → Σ_c(2455)^++ Ξ̅_c^′ −) = (1.69 ± 0.31 ± 0.12^+1.39_−0.56) × 10^−3 and ℬ(B^0 → Σ_c(2455)^0 Ξ̅_c^′ 0) = (1.28 ± 0.32 ± 0.10^+0.26_−0.22) × 10^−3, where the first and second uncertainties are statistical and systematic, respectively, and the third arises from the uncertainties in the absolute branching fractions of Ξ̅_c^− and Ξ̅_c^0 decays. This result represents the first observation of B-meson decays into a pair of charmed baryon-antibaryon states belonging to the same SU(3) flavor sextet.
ER  -