当前位置: X-MOL 学术J. High Energy Phys. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Indirect $$ \mathcal{CP} $$ probes of the Higgs-top-quark interaction: current LHC constraints and future opportunities
Journal of High Energy Physics ( IF 5.4 ) Pub Date : 2020-11-01 , DOI: 10.1007/jhep11(2020)127
Henning Bahl , Philip Bechtle , Sven Heinemeyer , Judith Katzy , Tobias Klingl , Krisztian Peters , Matthias Saimpert , Tim Stefaniak , Georg Weiglein

The $\mathcal{CP}$ structure of the Higgs boson in its coupling to the particles of the Standard Model is amongst the most important Higgs boson properties which have not yet been constrained with high precision. In this study, all relevant inclusive and differential Higgs boson measurements from the ATLAS and CMS experiments are used to constrain the $\mathcal{CP}$-nature of the top-Yukawa interaction. The model dependence of the constraints is studied by successively allowing for new physics contributions to the couplings of the Higgs boson to massive vector bosons, to photons, and to gluons. In the most general case, we find that the current data still permits a significant $\mathcal{CP}$-odd component in the top-Yukawa coupling. Furthermore, we explore the prospects to further constrain the $\mathcal{CP}$ properties of this coupling with future LHC data by determining $tH$ production rates independently from possible accompanying variations of the $t\bar t H$ rate. This is achieved via a careful selection of discriminating observables. At the HL-LHC, we find that evidence for $tH$ production at the Standard Model rate can be achieved in the Higgs to diphoton decay channel alone.

中文翻译:

希格斯-顶夸克相互作用的间接 $$ \mathcal{CP} $$ 探测:当前 LHC 的限制和未来的机会

希格斯玻色子与标准模型粒子耦合的 $\mathcal{CP}$ 结构是最重要的希格斯玻色子性质之一,尚未受到高精度约束。在这项研究中,来自 ATLAS 和 CMS 实验的所有相关的包容性和微分希格斯玻色子测量值都用于约束顶汤川相互作用的 $\mathcal{CP}$-性质。通过对希格斯玻色子与大量矢量玻色子、光子和胶子的耦合的新物理学贡献,不断地允许新的物理学贡献来研究约束的模型依赖性。在最一般的情况下,我们发现当前数据仍然允许在顶部汤川耦合中存在显着的 $\mathcal{CP}$-odd 分量。此外,我们通过独立于 $t\bar t H$ 速率可能伴随的变化来确定 $tH$ 生产率,探索进一步约束这种耦合与未来 LHC 数据的 $\mathcal{CP}$ 属性的前景。这是通过仔细选择有区别的可观察量来实现的。在 HL-LHC 中,我们发现仅在希格斯到双光子衰变通道中就可以实现标准模型速率下产生 $tH$ 的证据。
更新日期:2020-11-01
down
wechat
bug