https://doi.org/10.1140/epjc/s10052-022-10449-z
Regular Article - Theoretical Physics
Dark matter in the CP-violating NMSSM
1
School of Mathematics and Physics, Hubei Polytechnic University, 435003, Huangshi, China
2
Laboratoire de Physique Théorique et Hautes Energies (LPTHE), UMR 7589, Sorbonne Université et CNRS, 4 place Jussieu, 75252, Paris Cedex 05, France
3
East African Institute for Fundamental Research (ICTP-EAIFR), University of Rwanda, Kigali, Rwanda
Received:
30
January
2022
Accepted:
18
May
2022
Published online:
18
June
2022
In the Next-to-Minimal Supersymmetric Standard Model there is a strong correlation between the mass terms corresponding to the singlet Higgs and the singlino interaction states, both of which are proportional to the parameter 
. If this parameter is complex, explicit CP-violation occurs in the Higgs as well as the neutralino sectors of the model at the tree level, unlike in the minimal scenario. A small magnitude of typically yields a 
(10) GeV lightest neutralino with a dominant singlino component. In such a scenario, the phase of , beside modifying the properties of the five Higgs bosons, can also have a crucial impact on the phenomenology of the neutralino dark matter. In this study we perform a first investigation of this impact on the relic abundance of the dark matter solutions with sub-100 GeV masses, obtained for parameter space configurations of the model that are consistent with a variety of current experimental data.
© The Author(s) 2022
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Funded by SCOAP3
