论文标题
Higgs Boson互动的$ CP $属性与$τ$ -Leptons与Atlas检测器的测量
Measurement of the $CP$ properties of Higgs boson interactions with $τ$-leptons with the ATLAS detector
论文作者
论文摘要
提出了对Higgs Boson和$τ$ -Leptons之间相互作用的收费共轭和平等性（$ CP $）的研究。该研究基于$ CP $敏感的角度可观察物的测量，该可见衰减产物的损失$τ$ -Lepton腐烂，至少需要一个耐药的衰减。该分析使用139 fb $^{ - 1} $的质子$ - $ - 质子碰撞数据记录在$ \ sqrt {s} = 13 $ tev的质量质量碰撞数据中，该数据与大型Hadron撞机的Atlas检测器一起记录。 Higgs Boson和$τ$ -Leptons之间的$ CP $ - 略有竞争的贡献由单个混合角度参数$ ϕ_τ $在广义的Yukawa交互作用中描述。在不假设$ H \rightArrowτ$信号强度的标准模型假设的情况下，混合角$ ϕ_τ $的测量为$ 9^{\ circ} \ pm 16^{\ circ} $，预期价值为$ 0^{\ circ} \ pm 28^{\ pm 28^{\ circ} $在68％的限制下。纯$ CP $ -ODD假设在3.4个标准偏差的水平上被散布。结果与标准模型中希格斯玻色子的预测兼容。
A study of the charge conjugation and parity ($CP$) properties of the interaction between the Higgs boson and $τ$-leptons is presented. The study is based on a measurement of $CP$-sensitive angular observables defined by the visible decay products of $τ$-lepton decays, where at least one hadronic decay is required. The analysis uses 139 fb$^{-1}$ of proton$-$proton collision data recorded at a centre-of-mass energy of $\sqrt{s}= 13$ TeV with the ATLAS detector at the Large Hadron Collider. Contributions from $CP$-violating interactions between the Higgs boson and $τ$-leptons are described by a single mixing angle parameter $ϕ_τ$ in the generalised Yukawa interaction. Without assuming the Standard Model hypothesis for the $H\rightarrowττ$ signal strength, the mixing angle $ϕ_τ$ is measured to be $9^{\circ} \pm 16^{\circ}$, with an expected value of $0^{\circ} \pm 28^{\circ}$ at the 68% confidence level. The pure $CP$-odd hypothesis is disfavoured at a level of 3.4 standard deviations. The results are compatible with the predictions for the Higgs boson in the Standard Model.
