AI 中文总结
本文利用因子化方法计算了企鹅主导的 $B\to\phi K$ 衰变的标准模型基准，构造同位旋可观测量，并探讨了新物理在 $I=0$ 和 $I=1$ 扇区中的敏感性，发现现有数据与标准模型一致但留有新物理空间。
AI 中文摘要
企鹅图主导的 $B\to\phi K$ 衰变为超越标准模型的新物理提供了灵敏的探针。随着实验精度的不断提高，对这些衰变的解释需要控制双重卡比博抑制的强子贡献。利用因子化方法，我们获得了分支比和 CP 破坏可观测量（包括 $B_d^0\to\phi K_{\rm S}$ 中的强子相移）的标准模型基准值。$B_s^0\to\phi K_{\rm S}$ 道中相应的企鹅效应不受卡比博抑制，为该贡献提供了额外见解。比较中性及带电 $B\to\phi K$ 模式进一步允许构造同位旋可观测量。我们讨论了它们在标准模型中的预期值以及对 $I=0$ 和 $I=1$ 扇区中新物理的敏感性。现有数据与标准模型一致，同时为新物理贡献留下了相当大的空间。
英文摘要
The penguin-dominated $B\toϕK$ decays provide sensitive probes of physics beyond the Standard Model. Interpreting them at increasing experimental precision requires control of doubly Cabibbo-suppressed hadronic contributions. Using a factorization approach, we obtain Standard Model benchmarks for the branching ratios and CP-violating observables, including the hadronic phase shift in $B_d^0\toϕK_{\rm S}$. The $B_s^0\toϕK_{\rm S}$ channel, in which the corresponding penguin effects are not Cabibbo-suppressed, offers additional insight into these contributions. Comparing the neutral and charged $B\toϕK$ modes further allows the construction of isospin observables. We discuss their Standard-Model expectations and sensitivity to New Physics in the $I=0$ and $I=1$ sectors. The available data are consistent with the Standard Model, while leaving substantial room for New Physics contributions.
Comments6 pages, 2 figures, Invited talk at the Fourteenth Annual Large Hadron Collider Physics (LHCP2026) conference, Paris, France, 18-22 May 2026
