Probing GeV-scale MSSM neutralino dark matter in collider and direct detection experiments

• Main Authors: Guang Hua Duan, Wenyu Wang, Lei Wu, Jin Min Yang, Jun Zhao
• Format: Article
• Language: English
• Published: Elsevier 2018-03-01
• Series: Physics Letters B
• Online Access: http://www.sciencedirect.com/science/article/pii/S0370269318300388

Given the recent constraints from the dark matter (DM) direct detections, we examine a light GeV-scale (2–30 GeV) neutralino DM in the alignment limit of the Minimal Supersymmetric Standard Model (MSSM). In this limit without decoupling, the heavy CP-even scalar H plays the role of the Standard Model (SM) Higgs boson while the other scalar h can be rather light so that the DM can annihilate through the h resonance or into a pair of h to achieve the observed relic density. With the current collider and cosmological constraints, we find that such a light neutralino DM above 6 GeV can be excluded by the XENON-1T (2017) limits while the survivied parameter space below 6 GeV can be fully tested by the future germanium-based light dark matter detections (such as CDEX), by the Higgs coupling precison measurements or by the production process e+e−→hA at an electron–positron collider (Higgs factory).