论文标题
增强$ B \至kμ^+μ^ - $的CP不对称
Enhanced CP asymmetries in $B \to K μ^+ μ^-$
论文作者
论文摘要
我们表明，$ r_k^\ mathrm {exp} $和$ r_ {k^\ ast}^\ mathrm {exp} $的当前值可以通过允许$ΔC_9^{μμμ} $在$ΔC_的情况下进行$ΔC_9^{μμμ} $ nonzeros compy in Complection sevection $Δc_9^reftive，从而适应$ΔC_9^{μμm具有复杂$ΔC_{9,10}^{μμ} $满足$ΔC_{9}^{μμ} = - ΔC_{10}^{μμμ} $的方案。然后，可以通过测量CP-Asymmemetry，$ \ MATHCAL {A} _ \ MATHRM {CP} $来测试弱CP侵入阶段的存在。我们表明，这种不对称性在每个$ c \ bar c $ resonance的峰值上得到了增强，实际上在$ j/ψ$和$ψ（2s）$的接近附近更为明显。因此，在共振峰之前和之后测量$ \ Mathcal {a} _ \ Mathrm {cp} $，可以启示来自标准模型之外的CP侵略，或者在构建新物理学的现实场景时是一个重大约束。
We show that the current values of $R_K^\mathrm{exp}$ and $R_{K^\ast}^\mathrm{exp}$ can be accommodated by allowing a nonzero New Physics coupling $δC_9^{μμ}$ to be complex, both in the scenario in which only $δC_9^{μμ}$ is affected, and in the scenario with complex $δC_{9,10}^{μμ}$ satisfying $δC_{9}^{μμ}=-δC_{10}^{μμ}$. A presence of the weak CP-violating phase can then be tested by measuring the CP-asymmetry, $\mathcal{A}_\mathrm{CP}$. We show that this asymmetry is enhanced around the peak of each $c\bar c$-resonance, and in fact more pronounced in the close vicinity of $J/ψ$ and $ψ(2S)$. Therefore, measuring $\mathcal{A}_\mathrm{CP}$ before and after the resonances' peak could be revelatory of the CP-violation that originates from beyond the Standard Model, or to be a significant constrain when building a realistic scenario of New Physics.
