A SM-like Higgs near 125 GeV in low energy SUSY: a comparative study for MSSM and NMSSM

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	A SM-like Higgs near 125 GeV in low energy SUSY: a comparative study for MSSM and NMSSM
	Yang, JM
刊名	JOURNAL OF HIGH ENERGY PHYSICS
	2012
期号	3 页码:86
关键词	SUPERSYMMETRIC STANDARD MODEL FINE-TUNING PRICE DARK-MATTER BOSONS MASSES SECTOR LEP COUPLINGS LHC PROGRAM
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	Motivated by the recent LHC hints of a Higgs boson around 125 GeV, we assume a SM-like Higgs with the mass 123-127 GeV and study its implication in low energy SUSY by comparing the MSSM and NMSSM. We consider various experimental constraints at 2 sigma level (including the muon g - 2 and the dark matter relic density) and perform a comprehensive scan over the parameter space of each model. Then in the parameter space which is allowed by current experimental constraints and also predicts a SM-like Higgs in 123-127 GeV, we examine the properties of the sensitive parameters (like the top squark mass and the trilinear coupling A(t)) and calculate the rates of the di-photon signal and the VV* (V = W, Z) signals at the LHC. Our typical findings are: (i) In the MSSM the top squark and A(t) must be large and thus incur some fine-tuning, which can be much ameliorated in the NMSSM; (ii) In the MSSM a light stau is needed to enhance the di-photon rate of the SM-like Higgs to exceed its SM prediction, while in the NMSSM the di-photon rate can be readily enhanced in several ways; (iii) In the MSSM the signal rates of pp -> h -> VV* at the LHC are never enhanced compared with their SM predictions, while in the NMSSM they may get enhanced significantly; (iv) A large part of the parameter space so far survived will be soon covered by the expected XENON100(2012) sensitivity (especially for the NMSSM).
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]; Chinese Academy of Sciences [KJCX2.YW.W10]
原文出处	http://dx.doi.org/10.1007/JHEP03(2012)086
语种	英语
WOS记录号	WOS:000302412400031
公开日期	2014-04-25
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/15149]
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. A SM-like Higgs near 125 GeV in low energy SUSY: a comparative study for MSSM and NMSSM[J]. JOURNAL OF HIGH ENERGY PHYSICS,2012(3):86.
APA	Yang, JM.(2012).A SM-like Higgs near 125 GeV in low energy SUSY: a comparative study for MSSM and NMSSM.JOURNAL OF HIGH ENERGY PHYSICS(3),86.
MLA	Yang, JM."A SM-like Higgs near 125 GeV in low energy SUSY: a comparative study for MSSM and NMSSM".JOURNAL OF HIGH ENERGY PHYSICS .3(2012):86.