2023/06/25 by Chao-Qiang Geng, Xiang-Nan Jin, Geng, Chao-Qiang +3 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2306.14280
openalex publication_date 2023/06/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 3P0 model and chiral selection rule. The decay branching ratios of B+ → p Λ and B0 → p p are calculated to be 2.31 × 10-7 and 1.27 × 10 -8 , which are consistent with the current experiments, respectively. 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(→ p π-) Λ (→ p π+) , where the time-averaged CP-odd observables are estimated to be large. The direct CP asymmetries of B+ → p Λ and B0 → pp are found to be 26.2% and -3.1% for a positive strong phase and -36.9% and 4.2% for a negative strong phase, respectively.