2025/06/17 by J. Ouyang, Ou-Yang, Jing, Run-Hui Li +3
Physics and Astronomy · Engineering · #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Particle Accelerators and Free-Electron Lasers
paper · pdf · doi:10.48550/arxiv.2506.14675
We systematically analyze the decays B(s) → D(s) (V^* →) V P, where V^* represents a vector resonance (ρ, ω or K^*), and V P denotes the final-state meson pairs ω π, ρ π and ρ K. The intermediate subprocesses B(s) → D(s) V^* are calculated in the factorization-assisted topological-amplitude approach, while the intermediate resonant states V^* are modeled using a relativistic Breit-Wigner distribution, subsequently decaying into VP through strong interactions. We predict the off-shell effects of the ground-state resonances (ρ, ω, K^*) in B(s) → D(s) (V^* → )V P. Our results show that the virtual contributions from ρ→ ω π, ω→ ρ π, and K^* → ρ K are crucial for these three-body decays, B(s) → D(s) V P. In particular, the branching fractions arising from the ρ and ω virtual effects can be comparable to the total decay rates of B(s) → D(s) ω π and B(s) → D(s) ρ π, respectively. Decays with branching fractions of order 10-6-10-4 are expected to be measurable at Belle II and LHCb. Compared with previous perturbative QCD predictions for B(s) → D(s) (ρ→) ω π, our results are consistent but exhibit higher precision.