Enhanced soft limits in de Sitter space
Abstract In flat space, the scattering amplitudes of certain scalar effective field theories exhibit enhanced soft limits due to the presence of hidden symmetries. In this paper, we show that this phenomenon extends to wavefunction coefficients in de Sitter space. Using a representation in terms of...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2022-12-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP12(2022)064 |
| _version_ | 1797860026142949376 |
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| author | C. Armstrong A. Lipstein J. Mei |
| author_facet | C. Armstrong A. Lipstein J. Mei |
| author_sort | C. Armstrong |
| collection | DOAJ |
| description | Abstract In flat space, the scattering amplitudes of certain scalar effective field theories exhibit enhanced soft limits due to the presence of hidden symmetries. In this paper, we show that this phenomenon extends to wavefunction coefficients in de Sitter space. Using a representation in terms of boundary conformal generators acting on contact diagrams, we find that imposing enhanced soft limits fixes the masses and four-point couplings (including curvature corrections) in agreement with Lagrangians recently derived from hidden symmetries. Higher-point couplings can then be fixed using a bootstrap procedure which we illustrate at six points. We also discuss implications for the double copy in de Sitter space. |
| first_indexed | 2024-04-09T21:40:07Z |
| format | Article |
| id | doaj.art-7634d77aec9d408fba82a82a5e325789 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-04-09T21:40:07Z |
| publishDate | 2022-12-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-7634d77aec9d408fba82a82a5e3257892023-03-26T11:05:03ZengSpringerOpenJournal of High Energy Physics1029-84792022-12-0120221212810.1007/JHEP12(2022)064Enhanced soft limits in de Sitter spaceC. Armstrong0A. Lipstein1J. Mei2Department of Mathematical Sciences, Durham UniversityDepartment of Mathematical Sciences, Durham UniversityDepartment of Mathematical Sciences, Durham UniversityAbstract In flat space, the scattering amplitudes of certain scalar effective field theories exhibit enhanced soft limits due to the presence of hidden symmetries. In this paper, we show that this phenomenon extends to wavefunction coefficients in de Sitter space. Using a representation in terms of boundary conformal generators acting on contact diagrams, we find that imposing enhanced soft limits fixes the masses and four-point couplings (including curvature corrections) in agreement with Lagrangians recently derived from hidden symmetries. Higher-point couplings can then be fixed using a bootstrap procedure which we illustrate at six points. We also discuss implications for the double copy in de Sitter space.https://doi.org/10.1007/JHEP12(2022)064AdS-CFT CorrespondenceScattering Amplitudes |
| spellingShingle | C. Armstrong A. Lipstein J. Mei Enhanced soft limits in de Sitter space Journal of High Energy Physics AdS-CFT Correspondence Scattering Amplitudes |
| title | Enhanced soft limits in de Sitter space |
| title_full | Enhanced soft limits in de Sitter space |
| title_fullStr | Enhanced soft limits in de Sitter space |
| title_full_unstemmed | Enhanced soft limits in de Sitter space |
| title_short | Enhanced soft limits in de Sitter space |
| title_sort | enhanced soft limits in de sitter space |
| topic | AdS-CFT Correspondence Scattering Amplitudes |
| url | https://doi.org/10.1007/JHEP12(2022)064 |
| work_keys_str_mv | AT carmstrong enhancedsoftlimitsindesitterspace AT alipstein enhancedsoftlimitsindesitterspace AT jmei enhancedsoftlimitsindesitterspace |