论文标题
$ b \ to s \ ell \ ell \ el $衰减的新物理学与复杂的威尔逊系数
New physics in $b\to s \ell\ell$ decays with complex Wilson coefficients
论文作者
论文摘要
我们对独家$ b \ to S \ ell^+\ ell^ - $衰减的新物理学（NP）效应进行数据驱动分析，其中二个操作员二级操作员考虑了标量，伪量表，矢量和轴向矢量操作员，并具有相应的Wilson系数（WC）。分析是通过最新数据进行的，同时将结果与相对较旧的数据集进行了比较。我们发现，带有向量muon耦合的左手夸克电流是唯一一个单操作器$（\ Mathcal {o} _9）$方案，可以在两种情况下都具有大型非零想象贡献的真实和复杂WC中的数据。我们同时应用模型选择工具，例如交叉验证和信息理论方法，例如Akaike信息标准（AIC），以找出可以最好地解释此频道中可用数据的操作员或操作员集。带有复杂WC的$ \ Mathcal {O} _9 $是唯一可以在测试中幸存下来的单操作机构。但是，在测试中幸存下来有几个和三个操作员方案（具有真实或复杂的WC），并且操作员$ \ Mathcal {O} _9 $在其中很常见。
We perform a data-driven analysis of new physics (NP) effects in exclusive $b \to s \ell^+\ell^-$ decays in a model-independent effective theory approach with dimension six operators considering scalar, pseudo-scalar, vector and axial-vector operators with the corresponding Wilson coefficients (WC) taken to be complex. The analysis has been done with the most recent data while comparing the outcome with that from the relatively old data-set. We find that a left-handed quark current with vector muon coupling is the only one-operator $(\mathcal{O}_9)$ scenario that can explain the data in both the cases with real and complex WC with a large non-zero imaginary contribution. We simultaneously apply model selection tools like cross-validation and information-theoretic approach like Akaike Information Criterion (AIC) to find out the operator or sets of operators that can best explain the available data in this channel. The $\mathcal{O}_9$ with complex WC is the only one-operator scenario which survives the test. However, there are a few two and three-operator scenarios (with real or complex WCs) which survive the test, and the operator $\mathcal{O}_9$ is common among them.
