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| Ye, Gen; Piao, Yun-Song | |
| Positivity in the effective field theory of cosmological perturbations | |
| Source Publication | EUROPEAN PHYSICAL JOURNAL C
 |
| Language | 英语 |
| Keyword | BEHAVIOR |
| Abstract | Requiring the existence of a unitary, causal and local UV-completion places a set of positivity bounds on the corresponding effective field theories (EFTs). We discuss the obstructions and possibility in applying the positivity bound to cosmology, in particular the EFT of cosmological perturbations. Taking a cT = 1 beyond-Horndeski EFT as an illustrative example, we derive such bounds, which incorporate the cosmological correction of order H2/ 2, being the cutoff scale. The derived bounds are applied to slow-roll inflation with beyond Horndeski operators. It is found that the cosmological positivity bounds may be either stronger or weaker than their flat space counterpart. |
| 2020 | |
| ISSN | 1434-6044 |
| Volume | 80Issue:5Pages:421 |
| Cooperation Status | 国内 |
| Subject Area | Physics |
| MOST Discipline Catalogue | Physics, Particles & Fields |
| DOI | 10.1140/epjc/s10052-020-7973-z |
| Indexed By | SCIE |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.itp.ac.cn/handle/311006/27435 |
| Collection | SCI期刊论文 |
| Affiliation | 1.[Ye, Gen 2.Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Ye, Gen,Piao, Yun-Song. Positivity in the effective field theory of cosmological perturbations[J]. EUROPEAN PHYSICAL JOURNAL C,2020,80(5):421. |
| APA | Ye, Gen,&Piao, Yun-Song.(2020).Positivity in the effective field theory of cosmological perturbations.EUROPEAN PHYSICAL JOURNAL C,80(5),421. |
| MLA | Ye, Gen,et al."Positivity in the effective field theory of cosmological perturbations".EUROPEAN PHYSICAL JOURNAL C 80.5(2020):421. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Positivity in the ef（582KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | Application Full Text | |
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