论文标题
$ b_d \ to k_s \ ell \ ell $的时间相关的角度分析，新物理的新基准
The time-dependent angular analysis of $B_d\to K_S\ell\ell$, a new benchmark for new physics
论文作者
论文摘要
我们考虑到$ b_d \ to k_s \ ell \ ell $的时间依赖性分析，这些分析考虑了$ b_d $ meson的时间进化，并将其混合成$ \ bar {b} _d $。我们讨论了与CP结合以透明的方式定义角度可观察物所需的角惯例。包括时间演化的包含使我们能够识别六个新的可观察物，其中三个可以从与时间有关的标记分析中访问。我们还表明，如果有风味标记，可以通过在习惯环境中进行时间集成度的测量来获得这些可观察到的物品。我们为SM和NP模型中的这些可观察物提供了简单而精确的预测，这些模型对SM和Chirally翻转的操作员具有实际贡献，这些操作员与形态因素和魅力环的贡献无关。因此，这些可观察到的物品提供了当前全球偏爱的新物理场景的强大而强大的交叉检查，可拟合到$ b \ to $ b \ to s \ ell \ ell $ data。此外，我们讨论了这些可观察到的对涉及标量和张量运算符或CP侵略阶段的NP场景的敏感性。我们说明这些新的可观察物如何提供基准，以$ b \ to ssμm$区分各种NP方案。我们讨论了这些结果的扩展，以$ b_s $腐烂到$ f_0 $，$η$或$η'$。
We consider the time-dependent analysis of $B_d\to K_S\ell\ell$ taking into account the time-evolution of the $B_d$ meson and its mixing into $\bar{B}_d$. We discuss the angular conventions required to define the angular observables in a transparent way with respect to CP conjugation. The inclusion of time evolution allows us to identify six new observables, out of which three could be accessed from a time-dependent tagged analysis. We also show that these observables could be obtained by time-integrated measurements in a hadronic environment if flavour tagging is available. We provide simple and precise predictions for these observables in the SM and in NP models with real contributions to SM and chirally flipped operators, which are independent of form factors and charm-loop contributions. As such, these observables provide robust and powerful cross-checks of the New Physics scenarios currently favoured by global fits to $b\to s\ell\ell$ data. In addition, we discuss the sensitivity of these observables with respect to NP scenarios involving scalar and tensor operators, or CP-violating phases. We illustrate how these new observables can provide a benchmark to discriminate among the various NP scenarios in $b\to sμμ$. We discuss the extension of these results for $B_s$ decays into $f_0$, $η$ or $η'$.
