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题名: A SM-like Higgs near 125 GeV in low energy SUSY: a comparative study for MSSM and NMSSM
作者: Cao, JJ ;  Heng, ZX ;  Yang, JM ;  Zhang, YM ;  Zhu, JY
刊名: JOURNAL OF HIGH ENERGY PHYSICS
出版日期: 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
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; Zhang, Yanming] 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: 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).
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]; 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:000302412400031
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15149
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. 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.
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