2021/10/31 by Hua-Dian Niu, Guodong Li, Guo-Dong Li +3 · 6 citations
Physics and Astronomy · #Factorization #High-Energy Particle Collisions Research #Meson #Particle physics #Particle physics theoretical and experimental studies #Perturbative QCD #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Scalar (mathematics) #Scalar meson #Sigma #hep-ex #hep-ph
paper · pdf · open access · doi:10.1140/epjc/s10052-022-10111-8
published in The European Physical Journal C 82(2) (Springer Science+Business Media) · 17 pages, 3 figures, 3 tables, references updated, final version to appear in EPJC
openalex publication_date 2022/02/01 · arxiv created 2022/02/22 · arxiv updated 2022/03/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The decays of Bd,s0 → σσ, σf0, f0 f0, with σ and f0 denoting the light scalar mesons f0(500) and f0(980) in the two-quark picture, are studied in the perturbative QCD approach based on kT factorization. With the referenced value of the mixing angle |φ| ∼ 25^∘ for the σ-f0 mixing in the quark-flavor basis, it is of great interest to obtain that: (a) these neutral B-meson decays into σσ, σf0, and f0 f0 have large branching ratios in the order of 10-6 ∼ 10-4, which mean the possibly constructive interferences existed in the decays with different flavor states, and then are expected to be tested at the Large Hadron Collider beauty and/or Belle-II experiments in the (near) future; (b) the large direct CP violations could be easily found in the Bd0 → σσ, f0 f0 and Bd,s0 → σf0 decays, which indicate the considerable interferences between the tree and the penguin decay amplitudes involved in these four modes, and would be confronted with the future measurements; (c) these neutral B-meson decays could be examined through the secondary decay chain σ/f0 → π+ π-, namely, the four-body decays of Bd,s0 → (π+ π-)σ(f0) (π+ π-)σ(f0). On the other side, it seems that other 4 four-body decays of Bd0 → (π+ π-)σ (K+ K-)f0, Bs0 → (π+ π-)σ(f0) (K+ K-)f0, and Bs0 → (K+ K-)f0 (K+ K-)f0 could also be detected at the relevant experiments, if the f0 → K+ K- could be identified from the ϕ→ K+ K- clearly.