2021/12/28 by Hiwa A. Ahmed, Ahmed, Hiwa A., C. W. Xiao +1
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 #hep-ex #hep-ph
paper · pdf · doi:10.48550/arxiv.2112.14165
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openalex publication_date 2021/12/28 · arxiv created 2022/01/07 · arxiv updated 2022/01/10 · openalex created_date 2022/05/05 · openalex updated_date 2026/07/28
We investigate the resonant contributions in the decays B0(s) → D0 π+π-, B0(s) → D0 K+K-, and B0 → D0 π0η by considering the final state interactions within the chiral unitary approach. The scalar resonances produced dynamically from the final state interactions of these decays are the ones of f0(500), f0(980), and a0(980). In addition, the vector mesons ρ and ϕ produced in the p-wave are also taken into account. From the invariant mass distributions of B0 decays, one can see that the contributions of the states f0(500) and a0(980) are remarkably larger than the one of f0(980). However, for the case of B0s decays only a clear structure closed to the K+ K- threshold appears, which corresponds to the f0(980) state and has no signal for the f0(500) resonance. The dominant contributions are from the vector meson ϕ for the decay B0s → D0 K+K-, where the results of the K+ K- invariant mass distributions are in agreement with the experimental data up to 1.1 GeV. Moreover, the branching fractions and the ratios of branching fractions are also investigated, where some of them are consistent with the experimental measurements, and the branching fraction Br(B0 → D0 a0(980) [a0(980) → π0η])=(6.08 ± 0.72)× 10-5 and the ratio of branching fractions Br(B0→ D0 f0(980))/Br(B0→ D0 a0(980))=0.13 ± 0.03 are predicted.