Regular Article - Theoretical Physics
Phenomenology of a supersymmetric model inspired by inflation
Institute for Nuclear Physics, Karlsruhe Institute of Technology, 76021, Karlsruhe, Germany
2 Institute for Theoretical Particle Physics, Karlsruhe Institute of Technology, 76128, Karlsruhe, Germany
3 DESY, Notkestraße 85, 22607, Hamburg, Germany
4 II. Institut für Theoretische Physik, Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
Accepted: 13 January 2021
Published online: 9 February 2021
The current challenges in high energy physics and cosmology are to build coherent particle physics models to describe the phenomenology at colliders in the laboratory and the observations in the universe. From these observations, the existence of an inflationary phase in the early universe gives guidance for particle physics models. We study a supersymmetric model which incorporates successfully inflation by a non-minimal coupling to supergravity and shows a unique collider phenomenology. Motivated by experimental data, we set a special emphasis on a new singlet-like state at and single out possible observables for a future linear collider that permit a distinction of the model from a similar scenario without inflation. We define a benchmark scenario that is in agreement with current collider and Dark Matter constraints, and study the influence of the non-minimal coupling on the phenomenology. Measuring the singlet-like state with high precision on the percent level seems to be promising for resolving the models, even though the Standard Model-like Higgs couplings deviate only marginally. However, a hypothetical singlet-like state with couplings of about compared to a Standard Model Higgs at encourages further studies of such footprint scenarios of inflation.
© The Author(s) 2021
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