New Exceptional EFTs in de Sitter Space from Generalised Energy Conservation
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arXiv
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| Autori principali: | , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866915623450181632 |
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| author | Du, Zong-Zhe Stefanyszyn, David |
| author_facet | Du, Zong-Zhe Stefanyszyn, David |
| contents | We discover a surprising relationship between exceptional effective field theories (EFTs) in de Sitter space and a notion of \textit{generalised energy conservation} (GEC) of an S-matrix defined in an extended Poincaré patch of four-dimensional de Sitter. By demanding that such an S-matrix only has support when the total energies of in and out states are equal, we constrain the coupling constants in theories of self-interacting scalars living in the exceptional series of de Sitter representations. We rediscover the theories of Dirac-Born-Infeld (DBI) and Special Galileon, and when increasing the conformal dimension we find evidence for new exceptional theories where the four-point scalar self interactions are uniquely fixed in terms of a single coupling constant. We conjecture that for each integer conformal dimension $Δ\geq 4$, there is at least one exceptional EFT that can be entirely fixed by GEC. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_21759 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | New Exceptional EFTs in de Sitter Space from Generalised Energy Conservation Du, Zong-Zhe Stefanyszyn, David High Energy Physics - Theory General Relativity and Quantum Cosmology We discover a surprising relationship between exceptional effective field theories (EFTs) in de Sitter space and a notion of \textit{generalised energy conservation} (GEC) of an S-matrix defined in an extended Poincaré patch of four-dimensional de Sitter. By demanding that such an S-matrix only has support when the total energies of in and out states are equal, we constrain the coupling constants in theories of self-interacting scalars living in the exceptional series of de Sitter representations. We rediscover the theories of Dirac-Born-Infeld (DBI) and Special Galileon, and when increasing the conformal dimension we find evidence for new exceptional theories where the four-point scalar self interactions are uniquely fixed in terms of a single coupling constant. We conjecture that for each integer conformal dimension $Δ\geq 4$, there is at least one exceptional EFT that can be entirely fixed by GEC. |
| title | New Exceptional EFTs in de Sitter Space from Generalised Energy Conservation |
| topic | High Energy Physics - Theory General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2506.21759 |