2026/07/29 by Bhubanjyoti Bhattacharya, Marianne Bouchard, Alexandre Jean +2
Physics and Astronomy · #hep-ex #hep-ph
39 pages, 1 figure
arxiv created 2026/07/29 · arxiv updated 2026/07/30
Recently, a fit of charmless B→ PP decays (B ∈ \B0, B+, Bs0\, P ∈ \ π, K, η, η' \) to the latest data was performed under the assumption of flavour SU(3) symmetry [SU(3)F]. It was found that there is a 4.1σ disagreement with the SU(3)F limit of the Standard Model [\rm SMSU(3)F]. In this paper, we extend this analysis to charmless B → VV decays (V ∈ \ρ, K^*, ϕ, ω\). The fit examining B → ρK^* decays, assuming only isospin symmetry, is found to be acceptable. When we fit to B → VV decays with V ∈ \ ρ, K^* \ within SU(3)F, we find a 5.2σ discrepancy with SMSU(3)F. Finally, when B → VV decays with V ∈ \ ρ, K^*, ϕ, ω\ are considered, the discrepancy grows to >7σ. The theoretical input in this analysis is modest, so our results are quite rigorous, group theoretically, and hold almost exactly in the SU(3)F limit. Although it seems unlikely that the introduction of ∼ 30% SU(3)F-breaking effects can account for this discrepancy, this must be verified.