Probing Higgs boson CP properties with tt̄H at the LHC and the 100 TeV pp collider

Probing Higgs boson CP properties with tt̄H at the LHC and the 100 TeV pp collider
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DOI:
10.1142/s0217751x15501560
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发表时间:
2014-12
影响因子:
1.6
通讯作者:
Xiao-Gang He;Guan-Nan Li;Ya-juan Zheng
Xiao-Gang He;Guan-Nan Li;Ya-juan Zheng
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Xiao-Gang He;Guan-Nan Li;Ya-juan Zheng

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在标准模型 (SM) 费米子中,希格斯玻色子 H 与顶夸克 t 的耦合最大。这是研究 SM 之外的新物理的理想场所之一。在这项工作中,我们通过分析由 ttH 产生的最终状态变量形成的各种算子,研究了在大型强子对撞机和未来 33 TeV 和 100 TeV pp 对撞机上确定希格斯玻色子 CP 属性的潜力。 SM 耦合的辨别力是通过 H → γγ 和 H → bb 重建的希格斯玻色子获得的。我们发现 ttbb 过程可以在大型强子对撞机、33 TeV 和 100 TeV 对撞机的各种允许的希格斯到顶部耦合中提供超过 3σ 的辨别能力和 300fb−1 的集成光度。对于 ttγγ,大型强子对撞机的辨别能力将低于 3σ,而对于 33 TeV 和 100 TeV 对撞机,可以达到超过 3σ 的灵敏度。
The Higgs boson H has the largest coupling to the top quark t among the standard model (SM) fermions. This is one of the ideal places to investigate new physics beyond SM. In this work, we study the potential of determining Higgs boson CP properties at the LHC and future 33 TeV and 100 TeV pp colliders by analyzing various operators formed from final states variables in ttH production. The discrimination power from SM coupling is obtained with Higgs boson reconstructed from H → γγ and H → bb. We find that ttbb process can provide more than 3σ discrimination power with 300fb−1 integrated luminosity in a wide range of allowed Higgs to top couplings for the LHC, the 33 TeV and 100 TeV colliders. For ttγγ the discrimination power will be below 3σ at the LHC, while for 33 TeV and 100 TeV colliders, more than 3σ sensitivity can be reached.