Dark matter in NMSSM with small λ and κ

• Published in: Results in physics Vol. 49; p. 106531
• Main Authors: Almarashi, M.M., Alhazmi, F., Abdulhafidh, R., Basir, S. Abdul
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.06.2023; Elsevier
• Subjects: Dark matter; NMSSM; Supersymmetric models; Dark matter; NMSSM; Supersymmetric models
• ISSN: 2211-3797; 2211-3797
• DOI: 10.1016/j.rinp.2023.106531

The NMSSM provides an excellent dark matter candidate, usually the lightest neutralino (χ̃10) being the lightest supersymmetric particle (LSP), in the universe. It is a mixture of the bino, the neutral wino, the neutral higgsinos, and the singlino. In this work, we investigate the features of the lightest neutralino by concentrating on a specific region of the NMSSM parameter space with small values of both λ and κ, taking into account theoretical and experimental constraints, including relic density, direct and indirect detection constraints. We have found that the LSP dark matter is a singlino-dominated neutralino for most of the sample points of the chosen scenario. Thus, contrary to expectations, the NMSSM is not comparable to the MSSM in terms of dark matter properties as λ and κ are very small. The LSP can also be either higgsino-dominated or bino-dominated in some parameter space. The most important parameters affecting the mass and properties of the LSP are κ, λ/κ, and μeff. Further, we notice that σpSI≈1.02σnSI and σpSD≈0.76σnSD for all the surviving sample points. •The LSP dark matter is a singlino-dominated neutralino for most of the sample points.•DM properties in the NMSSM is not similar to that of the MSSM for small λ and κ.•The LSP can also be either higgsino-dominated or bino-dominated in some parameter space.•The most important parameters affecting the mass and properties of the LSP are κ, λ/κ, and μeff.•σpSI≈1.02σnSI and σpSD≈0.76σnSD for all the surviving sample points.