Higgs decay to dark matter in low energy SUSY: is it detectable at the LHC?

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	Higgs decay to dark matter in low energy SUSY: is it detectable at the LHC?
	Yang, JM
刊名	JOURNAL OF HIGH ENERGY PHYSICS
	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
ISSN号	1029-8479
通讯作者	Cao, JJ (reprint author), Henan Normal Univ, Dept Phys, Xinxiang 453007, 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.
学科主题	Physics
收录类别	SCI
资助信息	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]
原文出处	http://dx.doi.org/10.1007/JHEP06(2012)145
语种	英语
WOS记录号	WOS:000306418300054
公开日期	2014-04-25
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/15083]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Yang, JM. Higgs decay to dark matter in low energy SUSY: is it detectable at the LHC?[J]. JOURNAL OF HIGH ENERGY PHYSICS,2012(6):145.
APA	Yang, JM.(2012).Higgs decay to dark matter in low energy SUSY: is it detectable at the LHC?.JOURNAL OF HIGH ENERGY PHYSICS(6),145.
MLA	Yang, JM."Higgs decay to dark matter in low energy SUSY: is it detectable at the LHC?".JOURNAL OF HIGH ENERGY PHYSICS .6(2012):145.