Phenomenology of a Supersymmetric Model Inspired by Inflation

Hollik, Wolfgang Gregor; Paasch, Steven; Li, Cheng; Moortgat-Pick, Gudrid

doi:10.1140/epjc/s10052-021-08869-4

Journal Article

PUBDB-2022-00222

Phenomenology of a Supersymmetric Model Inspired by Inflation

Hollik, W. G.Extern* ; Li, C.DESY* ; Moortgat-Pick, G. (Corresponding author)DESY* ; Paasch, S.DESY*

2021
Springer Heidelberg

The European physical journal / C 81(2), 141 (2021) [10.1140/epjc/s10052-021-08869-4]

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Please use a persistent id in citations: doi:10.1140/epjc/s10052-021-08869-4 doi:10.3204/PUBDB-2022-00222

Report No.: DESY-20-059; P3H-20-013; TTP-2020-017; arXiv:2004.14852

Abstract: 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 $97\,\text {GeV}$ 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 $20\,\%$ compared to a Standard Model Higgs at $97\,\text {GeV}$ encourages further studies of such footprint scenarios of inflation.

Keyword(s): coupling: nonminimal ; coupling: Higgs ; inflation: model ; cosmological model: parameter space ; linear collider ; supersymmetry ; supergravity ; dark matter: parametrization ; coherence ; benchmark

Classification:

ddc:530

Note: The European Physical Journal C volume 81, Article number: 141 (2021). 21 pages, 10 figures; v2 matches published version

Contributing Institute(s):

Experimente an Lepton Collidern (FLC)

Research Program(s):

Experiment(s):

No specific instrument

Appears in the scientific report 2021

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Medline

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