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题名: DARK MATTER IN THE MSSM AND ITS SINGLET EXTENSION
作者: Yang, Jin Min
刊名: MODERN PHYSICS LETTERS A
出版日期: 2010
卷号: 25, 期号:41225, 页码:976-982
关键词: SUPERSYMMETRIC STANDARD MODEL ;  COSMIC-RAY POSITRON ;  HIGGS SECTOR ;  EXCESS
学科分类: Physics
通讯作者: Yang, JM , Henan Normal Univ, Coll Phys & Informat Engn, Xinxiang 453007, Peoples R China
部门归属: [Yang, JM] Henan Normal Univ, Coll Phys & Informat Engn, Xinxiang 453007, Peoples R China; [Yang, JM] Acad Sinica, Inst Theoret Phys, Beijing 100190, Peoples R China
英文摘要: We briefly review the supersymmetric explanation for the cosmic dark matter. Although the neutralino in the minimal supersymmetric model (MSSM), the next-to-minimal supersymmetric model (NMSSM) and the nearly minimal supersymmetric model (nMSSM) can naturally explain the dark matter relic density, the PAMELA result can hardly be explained in these popular models. In the general singlet extension of the MSSM,both the PAMELA result and the relic density can be explained by the singlino-like neutralino. Such singlino-like neutralinos annihilate into the singlet-like Higgs bosons, which are light enough to decay dominantly to muons or electrons, and the annihilation cross section can be greatly enhanced by the Sommerfeld effect via exchanging alight CP-even singlet-like Higgs boson. In this scenario, in order to meet the stringent LEP constraints, the SM-like Higgs boson tends to decay into the singlet Higgs pairs instead of b (b) over bar and consequently it will give a multi-muon signal h(SM) -> aa -> 4 mu or h(SM) -> hh -> 4a -> 8 mu at the LHC.
资助者: National Natural Science Foundation of China[10821504, 10725526, 10635030]
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000276973900013
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5122
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Yang, Jin Min. DARK MATTER IN THE MSSM AND ITS SINGLET EXTENSION[J]. MODERN PHYSICS LETTERS A,2010,25(41225):976-982.
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