New Kähler invariant Fayet–Iliopoulos terms in supergravity and cosmological applications

Antoniadis, I.; Rondeau, F. (2020). New Kähler invariant Fayet–Iliopoulos terms in supergravity and cosmological applications. The European physical journal. C, Particles and fields, 80(4) Springer 10.1140/epjc/s10052-020-7912-z

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Recently, a new type of constant Fayet–Iliopoulos (FI) terms was introduced in N = 1 supergravity, which do not require the gauging of the R-symmetry. We revisit and generalise these constructions, building a new class of Kähler invariant FI terms parametrised by a function of the gravitino mass as functional of the chiral superfields, which is then used to describe new models of inflation. They are based on a no-scale supergravity model of the inflaton chiral multi- plet, supplemented by an abelian vector multiplet with the new FI-term. We show that the inflaton potential is compati- ble with the CMB observational data, with a vacuum energy at the minimum that can be tuned to a tiny positive value. Finally, the axionic shift symmetry can be gauged by the U (1) which becomes massive. These models offer a mecha- nism for fixing the gravitino mass in no-scale supergravities, that corresponds to a flat direction of the scalar potential in the absence of the new FI-term; its origin in string theory is an interesting open problem.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Antoniadis, Ignatios

Subjects:

500 Science > 530 Physics

ISSN:

1434-6044

Publisher:

Springer

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

17 Jun 2020 10:40

Last Modified:

21 Jun 2020 02:41

Publisher DOI:

10.1140/epjc/s10052-020-7912-z

ArXiv ID:

1912.08117

BORIS DOI:

10.7892/boris.144704

URI:

https://boris.unibe.ch/id/eprint/144704

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