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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2509.04105 |
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| _version_ | 1866911457715683328 |
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| author | Park, Min Gi Cheong, Dhong Yeon Park, Seong Chan |
| author_facet | Park, Min Gi Cheong, Dhong Yeon Park, Seong Chan |
| contents | We revisit higher order corrections to the Starobinsky inflationary model using the most recent P-ACT-LB-BK18 data, which exhibits a mild but definite tension with the predictions of the original model. Our results demonstrate how even small {higher order} deformations of the Ricci scalar (e.g. $R^3, R^4,\cdots$) can bring the model into better agreement with current data and impose nontrivial constraints on the post-inflationary dynamics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_04105 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Beyond the Starobinsky model after ACT Park, Min Gi Cheong, Dhong Yeon Park, Seong Chan High Energy Physics - Phenomenology General Relativity and Quantum Cosmology We revisit higher order corrections to the Starobinsky inflationary model using the most recent P-ACT-LB-BK18 data, which exhibits a mild but definite tension with the predictions of the original model. Our results demonstrate how even small {higher order} deformations of the Ricci scalar (e.g. $R^3, R^4,\cdots$) can bring the model into better agreement with current data and impose nontrivial constraints on the post-inflationary dynamics. |
| title | Beyond the Starobinsky model after ACT |
| topic | High Energy Physics - Phenomenology General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2509.04105 |