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题名: On naturalness of the MSSM and NMSSM
作者: Kang, ZF ;  Li, JM ;  Li, TJ
刊名: JOURNAL OF HIGH ENERGY PHYSICS
出版日期: 2012
期号: 11, 页码:24
关键词: SUPERSYMMETRIC STANDARD MODEL ;  PHOTON HIGGS SIGNAL ;  DARK-MATTER ;  BOSON MASS ;  CONSTRAINTS ;  BREAKING ;  SEARCHES ;  SECTOR ;  LHC
学科分类: Physics
通讯作者: Kang, ZF (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
部门归属: [Kang, Zhaofeng; Li, Jinmian; Li, Tianjun] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China; [Li, Tianjun] Texas A&M Univ, George P & Cynthia W Mitchell Inst Fundamental Ph, College Stn, TX 77843 USA
英文摘要: With a bottom-up approach, we consider naturalness in the MSSM and NMSSM. Assuming the light stops. the LHC gluino search implies that the degree of fine tuning in both models is less than 2.5%. Taking the LHC hints for the SM-like Higgs boson mass m(h) similar to 125 GeV seriously, we find that naturalness will favor the NMSSM. We study the Higgs boson mass for several scenarios in the NMSSM: (1) A large A and the doublet-singlet Higgs boson mixing effect pushing upward or pulling downward nth. The former case can readily give the di-photon excess of the Higgs boson decay whereas the latter case can not. However, we point out that the former case has a new large fine-tuning related to strong A ROE running effect and vacuum stability. (2) A small A and the mixing effect pushing m(h) upward. Naturalness status becomes worse and no significant di-photon excess can be obtained. In these scenarios, the lightest supersymmetric particle (LSP) as a dark matter candidate is strongly disfavored by the XENON100 experiment. Even if the LSP can be a viable dark matter candidate, there does exist fine-tuning. The above naturalness evaluation is based on a high mediation scale for supersymmetry breaking, whereas for a low mediation scale, fine-tuning can be improved by about one order.
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000312197800024
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15000
Appears in Collections:理论物理所2012年知识产出_期刊论文

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Recommended Citation:
Kang, ZF,Li, JM,Li, TJ. On naturalness of the MSSM and NMSSM[J]. JOURNAL OF HIGH ENERGY PHYSICS,2012(11):24.
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