Inflection-point sgoldstino inflation in no-scale supergravity

We propose a modification of no-scale supergravity models which incorporates sgoldstino stabilization and supersymmetry (SUSY) breaking with a tunable cosmological constant by introducing a Kähler potential which yields a kinetic pole of order one. The resulting scalar potential may develop an infle...

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Bibliographic Details
Main Author: Constantinos Pallis
Format: Article
Language:English
Published: Elsevier 2023-08-01
Series:Physics Letters B
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269323003520
Description
Summary:We propose a modification of no-scale supergravity models which incorporates sgoldstino stabilization and supersymmetry (SUSY) breaking with a tunable cosmological constant by introducing a Kähler potential which yields a kinetic pole of order one. The resulting scalar potential may develop an inflection point, close to which an inflationary period can be realized for subplanckian field values consistently with the observational data. For central value of the spectral index ns, the necessary tuning is of the order of 10−6, the tensor-to-scalar ratio r is tiny whereas the running of ns, as, is around −3⋅10−3. Our proposal is compatible with high-scale SUSY and the results of LHC on the Higgs boson mass.
ISSN:0370-2693