Final-state rescattering in $$\bar{B}^{0}_{(s)}\rightarrow \Lambda ^{+}_{c}\bar{\Lambda }^{-}_{c}$$ decays
Year: 2026
Type: article
Abstract: The LHCb Collaboration has recently reported the first observation of the decay $${\bar{B}}_s^0\rightarrow \Lambda _c^+\bar{\Lambda }_c^-$$ B ¯ s 0 → Λ c + Λ ¯ c - , along with measurements of the branching fractions for both $${\bar{B}}^0\rightarrow \Lambda _c^+\bar{\Lambda }_c^-$$ B ¯ 0 → Λ c + Λ ¯ c - and $${\bar{B}}_s^0\rightarrow \Lambda _c^+\bar{\Lambda }_c^-$$ 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 $$\alpha $$ α , whereas the sizable values of $$\beta $$ β and $$\gamma $$ γ reflect strong interference between the two helicity amplitudes and provide sensitive probes of the decay dynamics.
Source: The European Physical Journal C
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Funders: National Natural Science Foundation of China, China Postdoctoral Science Foundation, Natural Science Foundation of Gansu Province, Fundamental Research Funds for the Central Universities, Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health (111 Center)
OpenAlex ID: W7222981838