论文标题
$ cp $违反$ b \ to s \ ell \ ell $：独立模型分析
$CP$ violation in $b \to s \ell \ell$: a model independent analysis
论文作者
论文摘要
我们对所有密码进行了独立于模型的全局拟合，并将$ b \更新为s \ ell \ ell $（$ \ ell = e，\，μ$）数据，假设新的物理耦合是复杂的。在新物理学普遍影响元素和电子领域的近似值中，一个或两个相关的操作员一次贡献，我们确定了为数据提供良好拟合的场景。事实证明，偏爱的方案与真正的拟合度相同。此外，复杂耦合的大小可能与它们的真实对应物一样大，并且这些大小反映在直接$ cp $不对称的预测中k^{*0}μ^+μ^ - $衰减。这些可观察到的各种解决方案的敏感性在低和高$ q^2 $ bin中不同。我们还确定可观察到的物品，可以用作特定新物理解决方案的唯一标识符。此外，我们检查$ a _ {\ rm cp} $和几个$ a_i $ observable之间的相关性。 $ a _ {\ rm cp} $和$ a_i $ observables的精确度量不仅可以确认存在其他弱相，而且还可以启用$ b \ tosμ^+μ^ - $ $^ - $ transition的唯一确定可能的新物理结构。
We perform a model-independent global fit to all germane and updated $b \to s \ell \ell$ ($\ell=e,\,μ$) data assuming new physics couplings to be complex. Under the approximation that new physics universally affects muon and electron sectors and that either one or two related operators contribute at a time, we identify scenarios which provide a good fit to the data. It turns out that the favored scenarios remain the same as obtained for the real fit. Further, the magnitude of complex couplings can be as large as that of their real counterparts and these are reflected in the predictions of the direct $CP$ asymmetry, $A_{\rm CP}$, in $B \to (K,\, K^*) μ^+ μ^-$ along with a number of angular $CP$ asymmetries, $A_i$, in $B^0 \to K^{*0} μ^+ μ^-$ decay. The sensitivities of these observables to various solutions are different in the low and high-$q^2$ bins. We also determine observables which can serve as unique identifier for a particular new physics solution. Moreover, we examine correlations between $A_{\rm CP}$ and several $A_i$ observables. A precise measurement of $A_{\rm CP}$ and $A_i$ observables can not only confirm the existence of additional weak phases but can also enable unique determination of Lorentz structure of possible new physics in $b \to s μ^+ μ^-$ transition.
