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Peer-reviewedCC BY 4.0The European Physical Journal C

Final-state rescattering in B̅0(s)→ Λ +cΛ ̅−c decays

  • Zhu-Ding Duan1,2
  • Xiao Huang1
  • Dong-Hao Li1
  • Run-Hui Li2
  • Jian-Peng Wang1,3
  • Fu-Sheng Yu1
  1. 1Lanzhou University
  2. 2Inner Mongolia University
  3. 3Universität Siegen
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Abstract

The LHCb Collaboration has recently reported the first observation of the decay B̅s0→ Λ c+Λ ̅c- B ¯ s 0 → Λ c + Λ ¯ c - , along with measurements of the branching fractions for both B̅0→ Λ c+Λ ̅c- B ¯ 0 → Λ c + Λ ¯ c - and B̅s0→ Λ c+Λ ̅c- B ¯ s 0 → Λ c + Λ ¯ c - . In this work, we investigate these two decays within the framework of final state re-scattering. Our results show that the predicted branching fractions are consistent with the experimental measurements, which indicates the significant role of long-distance final-state interactions in such baryonic B decays. Furthermore, we present predictions for the direct CP asymmetries and the asymmetry parameters. Numerically, both decays exhibit nearly vanishing direct CP asymmetries and suppressed longitudinal polarizations α α , whereas the sizable values of β β and γ γ reflect strong interference between the two helicity amplitudes and provide sensitive probes of the decay dynamics.

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Cite

BibTeXRIS
BibTeX
@article{duan2026finalstate,
  title = {{Final-state rescattering in $$\barB^0_(s)\rightarrow \Lambda ^+_c\bar\Lambda ^-_c$$ decays}},
  author = {Zhu-Ding Duan and Xiao Huang and Dong-Hao Li and Run-Hui Li and Jian-Peng Wang and Fu-Sheng Yu},
  journal = {The European Physical Journal C},
  year = {2026},
  month = oct,
  doi = {10.1140/epjc/s10052-026-16403-7},
  url = {https://link.springer.com/article/10.1140/epjc/s10052-026-16403-7},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Final-state rescattering in B̅^0_(s)→ Λ ^+_cΛ ̅^−_c decays
AU  - Zhu-Ding Duan
AU  - Xiao Huang
AU  - Dong-Hao Li
AU  - Run-Hui Li
AU  - Jian-Peng Wang
AU  - Fu-Sheng Yu
PY  - 2026
DA  - 2026/10/19
JO  - The European Physical Journal C
DO  - 10.1140/epjc/s10052-026-16403-7
UR  - https://link.springer.com/article/10.1140/epjc/s10052-026-16403-7
AB  - The LHCb Collaboration has recently reported the first observation of the decay B̅_s^0→ Λ _c^+Λ ̅_c^- B ¯ s 0 → Λ c + Λ ¯ c - , along with measurements of the branching fractions for both B̅^0→ Λ _c^+Λ ̅_c^- B ¯ 0 → Λ c + Λ ¯ c - and B̅_s^0→ Λ _c^+Λ ̅_c^- B ¯ s 0 → Λ c + Λ ¯ c - . In this work, we investigate these two decays within the framework of final state re-scattering. Our results show that the predicted branching fractions are consistent with the experimental measurements, which indicates the significant role of long-distance final-state interactions in such baryonic B decays. Furthermore, we present predictions for the direct CP asymmetries and the asymmetry parameters. Numerically, both decays exhibit nearly vanishing direct CP asymmetries and suppressed longitudinal polarizations α α , whereas the sizable values of β β and γ γ reflect strong interference between the two helicity amplitudes and provide sensitive probes of the decay dynamics.
SN  - 1434-6044
SN  - 1434-6052
ER  -