We inspect the exclusive hadronic decay modes B _d → ϕ(η ⁽′⁾, π, ω), induced by quark-level transitions such as b → d (ΔS = 0) in the vector-like down quark model. These decay modes exhibit high levels of suppression followed by the predicted branching fraction which leads us to scrutinize physics beyond the standard model. We constrain the new parameter space inferred from experimental limits to the leptonic B _d → ℓℓ(ℓ = e,μ, τ) and nonleptonic decay modes B _d → η′π ⁰ and B _u → ρ ⁻ η′. We then check that the new physics contributions have a significant impact on the clearly observed so-called branching ratio of the B _d → ϕ(η ⁽′⁾, π, ω) processes.

我们检查了独特的强子衰减模式B _d → ϕ ( η ⁽ ′ ⁾ , π , ω )，由类似向量的下夸克模型中的b → d (Δ S = 0)等夸克能级跃迁引起。这些衰减模式表现出高水平的抑制，然后是预测的分支分数，这使我们能够在标准模型之外仔细研究物理学。我们将从实验极限推断出的新参数空间限制为轻子B _d → ℓℓ ( ℓ = e , μ , τ ) 和非轻子衰变模式B _d → η ′ π ⁰和B _u → ρ ⁻ η ′。然后我们检查新的物理贡献对B _d → ϕ ( η ⁽ ' ⁾ , π , ω ) 过程的清晰观察到的所谓分支比有重大影响。