Constraining qqtt operators from four-top production: a case for enhanced eft sensitivity**supported by the 100-talent project of chinese academy of sciences
文献类型：期刊论文
| 作者 | Zhang,Cen |
| 刊名 | Chinese physics c
 |
| 出版日期 | 2018-02-01 |
| 卷号 | 42期号:2 |
| 关键词 | Top quark Lhc Effective field theory 14.65.ha 13.85.hd |
| ISSN号 | 1674-1137 |
| DOI | 10.1088/1674-1137/42/2/023104 |
| 英文摘要 | Abstract 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 / λ 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. |
| 语种 | 英语 |
| WOS记录号 | IOP:1674-1137-42-2-023104 |
| 出版者 | Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Sciences and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2175756 |
| 专题 | 高能物理研究所 |
| 作者单位 | Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China |
| 推荐引用方式 GB/T 7714 | Zhang,Cen. Constraining qqtt operators from four-top production: a case for enhanced eft sensitivity**supported by the 100-talent project of chinese academy of sciences[J]. Chinese physics c,2018,42(2). |
| APA | Zhang,Cen.(2018).Constraining qqtt operators from four-top production: a case for enhanced eft sensitivity**supported by the 100-talent project of chinese academy of sciences.Chinese physics c,42(2). |
| MLA | Zhang,Cen."Constraining qqtt operators from four-top production: a case for enhanced eft sensitivity**supported by the 100-talent project of chinese academy of sciences".Chinese physics c 42.2(2018). |
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