Assisted Fibre Inflation in Perturbative LVS
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arXiv
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| Hauptverfasser: | , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866913081536282624 |
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| author | Leontaris, George K. Shukla, Pramod |
| author_facet | Leontaris, George K. Shukla, Pramod |
| contents | We propose a multi-field fibre inflation scenario in type IIB perturbative large volume compactifications, showing that the multi-field dynamics suppresses trans-Planckian displacements of the canonical inflaton. Considering a concrete K3-fibred Calabi-Yau (CY) threefold with $h^{1,1}({\rm CY})=3$ and having certain underlying symmetries, we show that the presence of multi-fibre moduli creates an assisted inflation scenario where multiple moduli collectively help in producing the cosmological observables consistent with the current experimental bounds. We further argue that individual field range excursions $(Δϕ_n)$ corresponding to each of the inflaton fields can be estimated as $Δϕ_n = Δϕ/\sqrt{n}$, where $Δϕ$ denotes the effective single-field inflaton range needed to generate the desired cosmological observables, and $n$ is the number of moduli assisting the multi-fibre inflation. We also present various numerical benchmark models consistently producing cosmological observables in light of the recent ACT experiments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_22630 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Assisted Fibre Inflation in Perturbative LVS Leontaris, George K. Shukla, Pramod High Energy Physics - Theory Cosmology and Nongalactic Astrophysics We propose a multi-field fibre inflation scenario in type IIB perturbative large volume compactifications, showing that the multi-field dynamics suppresses trans-Planckian displacements of the canonical inflaton. Considering a concrete K3-fibred Calabi-Yau (CY) threefold with $h^{1,1}({\rm CY})=3$ and having certain underlying symmetries, we show that the presence of multi-fibre moduli creates an assisted inflation scenario where multiple moduli collectively help in producing the cosmological observables consistent with the current experimental bounds. We further argue that individual field range excursions $(Δϕ_n)$ corresponding to each of the inflaton fields can be estimated as $Δϕ_n = Δϕ/\sqrt{n}$, where $Δϕ$ denotes the effective single-field inflaton range needed to generate the desired cosmological observables, and $n$ is the number of moduli assisting the multi-fibre inflation. We also present various numerical benchmark models consistently producing cosmological observables in light of the recent ACT experiments. |
| title | Assisted Fibre Inflation in Perturbative LVS |
| topic | High Energy Physics - Theory Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2506.22630 |