Loops and trees in generic EFTs
文献类型：期刊论文
| 作者 | Craig, Nathaniel; Jiang, Minyuan1; Li, Ying-Ying; Sutherland, Dave5 |
| 刊名 | JOURNAL OF HIGH ENERGY PHYSICS
 |
| 出版日期 | 2020 |
| 期号 | 8页码:86 |
| ISSN号 | 1029-8479 |
| 关键词 | HELICITY AMPLITUDES FEYNMAN DIAGRAMS STANDARD MODEL UNITARITY |
| DOI | 10.1007/JHEP08(2020)086 |
| 英文摘要 | We consider aspects of tree and one-loop behavior in a generic 4d EFT of massless scalars, fermions, and vectors, with a particular eye to the high-energy limit of the Standard Model EFT at operator dimensions 6 and 8. First, we classify the possible Lorentz structures of operators and the subset of these that can arise at tree-level in a weakly coupled UV completion, extending the tree/loop classification through dimension 8 using functional methods. Second, we investigate how operators contribute to tree and one-loop helicity amplitudes, exploring the impact of non-renormalization theorems through dimension 8. We further observe that many dimension 6 contributions to helicity amplitudes, including rational parts, vanish exactly at one-loop level. This suggests the impact of helicity selection rules extends beyond one loop in non-supersymmetric EFTs. |
| 学科主题 | Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/27383]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 作者单位 | 1.Univ Calif Santa Barbara, Dept Phys, Lagoon Rd, Santa Barbara, CA 93106 USA 2.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Zhong Guan Cun East St 55, Beijing, Peoples R China 3.Fermilab Natl Accelerator Lab, Theoret Phys Dept, Discovery Rd, Batavia, IL USA 4.Hong Kong Univ Sci & Technol, Dept Phys, Kowloon, Clear Water Bay Rd, Hong Kong, Peoples R China 5.Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Lagoon Rd, Santa Barbara, CA 93106 USA 6.INFN, Sez Trieste, Via Bonomea 265, I-34136 Trieste, Italy |
| 推荐引用方式 GB/T 7714 | Craig, Nathaniel,Jiang, Minyuan,Li, Ying-Ying,et al. Loops and trees in generic EFTs[J]. JOURNAL OF HIGH ENERGY PHYSICS,2020(8):86. |
| APA | Craig, Nathaniel,Jiang, Minyuan,Li, Ying-Ying,&Sutherland, Dave.(2020).Loops and trees in generic EFTs.JOURNAL OF HIGH ENERGY PHYSICS(8),86. |
| MLA | Craig, Nathaniel,et al."Loops and trees in generic EFTs".JOURNAL OF HIGH ENERGY PHYSICS .8(2020):86. |
入库方式： OAI收割
来源：理论物理研究所
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