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题名: Dark matter in the singlet extension of MSSM: explanation of Pamela and implication on Higgs phenomenology
作者: Wang, Wenyu ;  Xiong, Zhaohua ;  Yang, Jin Min ;  Yu, Li-Xin
刊名: JOURNAL OF HIGH ENERGY PHYSICS
出版日期: 2009
期号: 11, 页码:-
关键词: SUPERSYMMETRIC STANDARD MODEL ;  COSMIC-RAY POSITRON ;  TAN-BETA
学科分类: Physics
通讯作者: Wang, WY , Beijing Univ Technol, Coll Appl Sci, Inst Theoret Phys, Beijing 100020, Peoples R China
部门归属: [Wang, WY; Xiong, ZH] Beijing Univ Technol, Coll Appl Sci, Inst Theoret Phys, Beijing 100020, Peoples R China; [Yang, JM; Yu, LX] Acad Sinica, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China
英文摘要: As discussed recently by Hooper and Tait, the singlino-like dark matter in the Minimal Supersymmetric Standard Model (MSSM) extended by a singlet Higgs superfield can give a perfect explanation for both the relic density and the Pamela result through the Sommerfeld-enhanced annihilation into singlet Higgs bosons (a or h followed by h -> aa) with a being light enough to decay dominantly to muons or electrons. In this work we analyze the parameter space required by such a dark matter explanation and also consider the constraints from the LEP experiments. We find that although the light singlet Higgs bosons have small mixings with the Higgs doublets in the allowed parameter space, their couplings with the SM-like Higgs boson h(SM) (the lightest doublet-dominant Higgs boson) can be enhanced by the soft parameter A(kappa) and, in order to meet the stringent LEP constraints, the h(SM) tends to decay into the singlet Higgs pairs a a or hh instead of b (b) over bar. So the h(SM) produced at the LHC will give a multi-muon signal, h(SM) -> aa -> 4 mu or h(SM) -> hh -> 4a -> 8 mu.
资助者: National Natural Science Foundation of China[10821504, 10725526, 10635030]; Natural Science Foundation of Beijing[1072001]
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000273012100053
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5221
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:
Wang, Wenyu,Xiong, Zhaohua,Yang, Jin Min,et al. Dark matter in the singlet extension of MSSM: explanation of Pamela and implication on Higgs phenomenology[J]. JOURNAL OF HIGH ENERGY PHYSICS,2009(11):-.
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