CP asymmetries in B meson two-body baryonic decays

• Published in: Physics letters. B 2023-11, Vol.846, p.138240, Article 138240
• Main Authors: Geng, Chao-Qiang, Jin, Xiang-Nan, Liu, Chia-Wei
• Format: Article
• Language: English
• ISSN: 0370-2693
• DOI: 10.1016/j.physletb.2023.138240

We study the CP-odd and CP-even observables of the B mesons decaying into a baryon and antibaryon. We estimate these observables through the P03 model and chiral selection rule. The decay branching ratio of B+→pΛ‾ is calculated to be (2.31±0.69)×10−7, which is consistent with the current experiments. The effects of the B−B‾ oscillations are considered, which largely suppress the direct CP asymmetries in the Bs0 decays. We suggest the experiments to visit Bs0→Λ(→pπ−)Λ‾(→p‾π+), where the time-averaged CP-odd observables are estimated to be large. The direct CP asymmetries of B+→pΛ‾ and B0→pp‾ are found to be (26.2±7.9)% and (−3.1±0.9)% for a positive strong phase and (−36.9±11.1)% and (4.2±1.3)% for a negative strong phase, respectively.