A microscopic model for inflation from supersymmetry breaking

Antoniadis, Ignatios; Chatrabhuti, A.; Isono, H.; Knoops, R. (2019). A microscopic model for inflation from supersymmetry breaking. The European physical journal. C, Particles and fields, 79(7) Springer 10.1140/epjc/s10052-019-7141-5

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We have proposed recently a framework for inflation driven by supersymmetry breaking with the inflaton being a superpartner of the goldstino, that avoids the main problems of supergravity inflation, allowing for: naturally small slow-roll parameters, small field initial conditions, absence of a (pseudo)scalar companion of the inflaton, and a nearby minimum with tuneable cosmological constant. It contains a chiral multiplet charged under a gauged R-symmetry which is restored at the maximum of the scalar potential with a plateau where inflation takes place. The effective field theory relies on two phenomenological parameters corresponding to corrections to the Kähler potential up to second order around the origin. The first guarantees the maximum at the origin and the second allows the tuning of the vacuum energy between the F- and D-term contributions. Here, we provide a microscopic model leading to the required effective theory. It is a Fayet–Iliopoulos model with two charged chiral multiplets under a second U(1) R-symmetry coupled to supergravity. In the Brout–Englert–Higgs phase of this U(1), the gauge field becomes massive and can be integrated out in the limit of small supersymmetry breaking scale. In this work, we perform this integration and we show that there is a region of parameter space where the effective supergravity realises our proposal of small field inflation from supersymmetry breaking consistently with observations and with a minimum of tuneable energy that can describe the present phase of our Universe.

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:

05 Nov 2019 09:09

Last Modified:

05 Nov 2019 09:09

Publisher DOI:

10.1140/epjc/s10052-019-7141-5

ArXiv ID:

1905.00706

BORIS DOI:

10.7892/boris.134171

URI:

https://boris.unibe.ch/id/eprint/134171

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