期刊
PHYSICS LETTERS B
卷 778, 期 -, 页码 296-302出版社
ELSEVIER
DOI: 10.1016/j.physletb.2018.01.030
关键词
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资金
- Nanjing Normal University
- National Natural Science Foundation of China (NNSFC) [11705093, 11305049, 11675242, 11375001]
- CAS Center for Excellence in Particle Physics (CCEPP)
- CAS Key Research Program of Frontier Sciences
- Key RAMP
- D Program of Ministry of Science and Technology of the People's Republic of China [2017YFA0402200-04]
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(-) -> h A at an electron-positron collider (Higgs factory). (C) 2018 The Authors. Published by Elsevier B.V.
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