• DOI:10.1103/PhysRevD.104.015017
• Corpus ID: 231861535

Singlino-dominated dark matter in Z3 -symmetric NMSSM

@article{Zhou2021SinglinodominatedDM,
  title={Singlino-dominated dark matter in 
Z3
-symmetric NMSSM},
  author={Haijing Zhou and Junjie Cao and Jingwei Lian and Di Zhang},
  journal={Physical Review D},
  year={2021}
}

• Haijing Zhou, Junjie Cao, +1 author Di Zhang
• Published 10 February 2021
• Physics
• Physical Review D

Singlino-dominated dark matter properties are investigated in the Z3 Next-toMinimal Supersymmetric Standard Model, producing superweak interactions with nucleons involved in dark matter direct detection experiments. Approximate analytical formulas describing the dark matter abundance and cross section in the scattering with nucleons are used to illustrate a dependence on theoretical parameters in neutralino and Higgs sectors. It is shown that the measured abundance requires a sizable singlet–doublet Higgs coupling parameter λ, while the experimental detection results prefer a small λ. The parameter space is then surveyed using a nest sampling technique guided by a likelihood function containing various observables in dark matter, Higgs, and B physics, such as the abundance and the scattering cross section. It is demonstrated that dark matter can achieve the correct abundance through χ̃1χ̃ 0 1 → tt̄ or co-annihilation with higgsinos. The former process provides significantly larger Bayesian evidence than the latter, but this will be examined by the near-future PandaX-4T experiment. If the experiment shows no signs of dark matter, it will become highly disfavored. Furthermore, four cases are summarized to suppress dark matter scattering with nucleons, namely, a small λ and three kinds of cancellation between different contributions. ar X iv :2 10 2. 05 30 9v 4 [ he pph ] 2 8 M ay 2 02 1