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题名: Higgs decay to dark matter in low energy SUSY: is it detectable at the LHC?
作者: Cao, JJ ;  Heng, ZX ;  Yang, JM ;  Zhu, JY
刊名: JOURNAL OF HIGH ENERGY PHYSICS
出版日期: 2012
期号: 6, 页码:145
关键词: SUPERSYMMETRIC STANDARD MODEL ;  ROOT-S=7 TEV ;  BOSON ;  SEARCH ;  MSSM ;  MASS ;  NMSSM ;  CONSTRAINTS ;  NEUTRALINO ;  COLLISIONS
学科分类: Physics
通讯作者: Cao, JJ (reprint author), Henan Normal Univ, Dept Phys, Xinxiang 453007, Peoples R China.
部门归属: [Cao, Junjie; Heng, Zhaoxia] Henan Normal Univ, Dept Phys, Xinxiang 453007, Peoples R China; [Cao, Junjie] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China; [Yang, Jin Min; Zhu, Jingya] Acad Sinica, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China
英文摘要: Due to the limited statistics so far accumulated in the Higgs boson search at the LHC, the Higgs boson property has not yet been tightly constrained and it is still allowed for the Higgs boson to decay invisibly to dark matter with a sizable branching ratio. In this work, we perform a comparative study for the Higgs decay to neutralino dark matter by considering three different low energy SUSY models: the minimal supersymmetric standard model (MSSM), the next-to-minimal supersymmetric standard models (NMSSM) and the nearly minimal supersymmetric standard model (nMSSM). Under current experimental constraints at 2 sigma level (including the muon g - 2 and the dark matter relic density), we scan over the parameter space of each model. Then in the allowed parameter space we calculate the branching ratio of the SM-like Higgs decay to neutralino dark matter and examine its observability at the LHC by considering three production channels: the weak boson fusion VV -> h, the associated production with a Z-boson pp -> hZ + X or a pair of top quarks pp -> ht (t) over bar + X. We find that in the MSSM such a decay is far below the detectable level; while in both the NMSSM and nMSSM the decay branching ratio can be large enough to be observable at the LHC. We conclude that at the LHC the interplay of detecting such an invisible decay and the visible di-photon decay may allow for a discrimination of different SUSY models.
资助者: National Natural Science Foundation of China (NNSFC) [10821504, 11135003, 10775039, 11075045]; Specialized Research Fund for the Doctoral Program of Higher Education [20104104110001]; Project of Knowledge Innovation Program (PKIP) of Chinese Academy of Sciences [KJCX2.YW.W10]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000306418300054
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15083
Appears in Collections:理论物理所2012年知识产出_期刊论文

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Recommended Citation:
Cao, JJ,Heng, ZX,Yang, JM,et al. Higgs decay to dark matter in low energy SUSY: is it detectable at the LHC?[J]. JOURNAL OF HIGH ENERGY PHYSICS,2012(6):145.
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