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  S-dual inflation and the String Swampland

Anchordoqui, L. A., Antoniadis, I., Lust, D., & Soriano, J. F. (2021). S-dual inflation and the String Swampland. Physical Review D, 103, 123537. Retrieved from https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2021-30.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000A-1BA2-1 Version Permalink: https://hdl.handle.net/21.11116/0000-000A-1BA3-0
Genre: Journal Article

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https://inspirehep.net/literature/1851691 (Any fulltext)
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Anchordoqui, Luis A.1, Author
Antoniadis, Ignatios1, Author
Lust, Dieter1, Author
Soriano, Jorge F.1, Author
Affiliations:
1Max Planck Institute for Physics, Max Planck Society and Cooperation Partners, ou_2253650              

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Free keywords: Theoretical Physics
 Abstract: The Swampland de Sitter conjecture in combination with upper limits on the tensor-to-scalar ratio r derived from observations of the cosmic microwave background endangers the paradigm of slow-roll single field inflation. This conjecture constrains the first and the second derivatives of the inflationary potential in terms of two (1) constants c and c′. In view of these restrictions we reexamine single-field inflationary potentials with S-duality symmetry, which ameliorate the unlikeliness problem of the initial condition. We compute r at next-to-leading order in slow-roll parameters for the most general form of S-dual potentials and confront model predictions to constraints imposed by the de Sitter conjecture. We find that c∼(10−1) and c′∼(10−2) can accommodate the 95\% CL upper limit on r. By imposing at least 50 e-folds of inflation with the effective field theory description only valid over a field displacement (1) when measured as a distance in the target space geometry, we further restrict c∼(10−2), while the constraint on c′ remains unchanged. We comment on how to accommodate the required small values of c and c′.

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 Dates: 2021
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: Other: MPP-2021-30
URI: https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2021-30
arXiv: arxiv:2103.07982
URI: https://inspirehep.net/literature/1851691
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Title: Physical Review D
  Abbreviation : Phys.Rev.D
Source Genre: Journal
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Pages: - Volume / Issue: 103 Sequence Number: - Start / End Page: 123537 Identifier: -