Probing top-quark couplings indirectly at Higgs factories
文献类型：期刊论文
| 作者 | Gu, JY; Durieux, G; Zhang C(张岑); Zhang, C ; Vryonidou, E
|
| 刊名 | CHINESE PHYSICS C
 |
| 出版日期 | 2018 |
| 卷号 | 42期号:12页码:123107 |
| 关键词 | effective field theory top quark lepton collider |
| ISSN号 | 1674-1137 |
| DOI | 10.1088/1674-1137/42/12/123107 |
| 文献子类 | Article |
| 英文摘要 | We perform a global effective-field-theory analysis to assess the combined precision of Higgs couplings, triple gauge-boson couplings, and top-quark couplings, at future circular e(+)e(-) colliders, with a focus on runs below the t (t) over bar production threshold. Deviations in the top-quark sector entering as one-loop corrections are consistently taken into account in the Higgs and diboson processes. We find that future lepton colliders running at center-of-mass energies below the t (t) over bar production threshold can still provide useful information on top-quark couplings, by measuring virtual top-quark effects. With rate and differential measurements, the indirect individual sensitivity achievable is better than at the high-luminosity LHC. However, strong correlations between the extracted top-quark and Higgs couplings are also present and lead to much weaker global constraints on top-quark couplings. This implies that a direct probe of top-quark couplings above the t (t) over bar production threshold is also helpful for the determination of Higgs and triple-gauge-boson couplings. In addition, we find that below the e(+)e(-) -> t (t) over barh production threshold, the top-quark Yukawa coupling can be determined by its loop corrections to all Higgs production and decay channels. Degeneracy with the ggh coupling can be resolved, and even a global limit is competitive with the prospects of a linear collider above the threshold. This provides an additional means of determining the top-quark Yukawa coupling indirectly at lepton colliders. |
| 电子版国际标准刊号 | 2058-6132 |
| WOS关键词 | ANOMALIES ; BOSON |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| CSCD记录号 | CSCD:6375090 |
| WOS记录号 | WOS:000451430300007 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/286900]  |
| 专题 | 高能物理研究所_理论物理室 高能物理研究所_加速器中心 |
| 通讯作者 | Zhang C(张岑) |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Gu, JY,Durieux, G,Zhang C,et al. Probing top-quark couplings indirectly at Higgs factories[J]. CHINESE PHYSICS C,2018,42(12):123107. |
| APA | Gu, JY,Durieux, G,张岑,Zhang, C,&Vryonidou, E.(2018).Probing top-quark couplings indirectly at Higgs factories.CHINESE PHYSICS C,42(12),123107. |
| MLA | Gu, JY,et al."Probing top-quark couplings indirectly at Higgs factories".CHINESE PHYSICS C 42.12(2018):123107. |
入库方式： OAI收割
来源：高能物理研究所
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