Constraining qqtt operators from four-top production: a case for enhanced EFT sensitivity
文献类型：期刊论文
| 作者 | Zhang, C ; Zhang C(张岑)
|
| 刊名 | CHINESE PHYSICS C
 |
| 出版日期 | 2018 |
| 卷号 | 42期号:2页码:23104 |
| 关键词 | Top quark LHC effective field theory |
| ISSN号 | 1674-1137 |
| DOI | 10.1088/1674-1137/42/2/023104 |
| 文献子类 | Article |
| 英文摘要 | Recently, experimental collaborations have reported O(10) upper limits on the signal strength of four top production at the LHC. Surprisingly, we find that the constraining power of four-top production on the qqtt type of operators is already competitive with the measurements of top-pair production, even though the precision level of the latter is more than two orders of magnitude better. This is explained by the enhanced sensitivity of the four-top cross section to qqtt operators, due to multiple insertion of operators in the squared amplitude, and to the large threshold energy of four-top production. We point out that even though the dominant contribution beyond the standard model comes from the O(C-4/A(8)) terms, the effective field theory expansion remains valid for a wide range of underlying theories. Considering the possible improvements of this measurement with higher integrated luminosity, we believe that this process will become even more crucial for probing and testing the standard model deviations in the top-quark sector, and will eventually provide valuable information about the top-quark properties, leading to significant improvements in precision top physics. |
| 电子版国际标准刊号 | 2058-6132 |
| WOS关键词 | B-TAGGED JETS ; E-MU EVENTS ; ATLAS DETECTOR ; CROSS-SECTION ; PP COLLISIONS ; TEV ; PLUS ; LHC |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| CSCD记录号 | CSCD:6159778 |
| WOS记录号 | WOS:000427537400006 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/285738]  |
| 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 | Zhang, C,Zhang C. Constraining qqtt operators from four-top production: a case for enhanced EFT sensitivity[J]. CHINESE PHYSICS C,2018,42(2):23104. |
| APA | Zhang, C,&张岑.(2018).Constraining qqtt operators from four-top production: a case for enhanced EFT sensitivity.CHINESE PHYSICS C,42(2),23104. |
| MLA | Zhang, C,et al."Constraining qqtt operators from four-top production: a case for enhanced EFT sensitivity".CHINESE PHYSICS C 42.2(2018):23104. |
入库方式： OAI收割
来源：高能物理研究所
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