STI Publications - View Publication Form #17083
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Publication Information
| Title | Perturbative unitarity and NEC violation in genesis cosmology | ||||
| Abstract | Explorations of the violation of null energy condition (NEC) in cosmology could enrich our understanding of the very early universe and the related gravity theories. Although a fully stable NEC violation can be realized in the ``beyond Horndeski'' theory, it remains an open question whether a violation of the NEC is allowed by some fundamental properties of UV-complete theories or the consistency requirements of effective field theory (EFT). We investigate the tree-level perturbative unitarity for stable NEC violations in the contexts of both Galileon and "beyond Horndeski" genesis cosmology, in which the universe is asymptotically Minkowskian in the past. We find that the constraints of perturbative unitarity imply that we may need some unknown new physics below the cut-off scale of the EFT other than that represented by the "beyond Horndeski" operators. | ||||
| Author(s) | Y. Cai, Ji Xu, Shuai Zhao, Siyi Zhou | ||||
| Publication Date | October 2022 | ||||
| Document Type | Journal Article | ||||
| Primary Institution | Thomas Jefferson National Accelerator Facility, Newport News | ||||
| Affiliation | Theory & Comp Physics / THEORY CENTER / THEORY CENTER | ||||
| Funding Source | Nuclear Physics (NP) | ||||
| Proprietary? | No | ||||
| This publication conveys | Technical Science Results | ||||
| Document Numbers |
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| Associated with an experiment | No | ||||
| Associated with EIC | No | ||||
| Supported by Jefferson Lab LDRD Funding | No |
Journal Article
| Journal Name | Journal of High Energy Physics |
| Refereed | Yes |
| Volume | 10(2022) |
| Issue | |
| Page(s) | 140 |
Attachments/Datasets/DOI Link
| Document(s) |
0d69155e-807e-4a7c-8b42-00fed5c797ec.pdf
(STI Document)
JHEP10(2022)140.pdf
(Accepted Manuscript)
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| DOI Link | |
| Dataset(s) | (none) |
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