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题名: LHC Higgs signatures from extended electroweak gauge symmetry
作者: Abe, T ;  Chen, N ;  He, HJ
刊名: JOURNAL OF HIGH ENERGY PHYSICS
出版日期: 2013
期号: 1, 页码:82
关键词: HIDDEN LOCAL SYMMETRIES ;  YANG-MILLS THEORY ;  STANDARD MODEL ;  WEAK INTERACTIONS ;  MASSLESS PARTICLES ;  BROKEN SYMMETRIES ;  VECTOR-MESONS ;  HIGH-ENERGIES ;  BOSON MASS ;  UNITARITY
学科分类: Physics
通讯作者: Abe, T (reprint author), Tsinghua Univ, Inst Modern Phys, Beijing 100084, Peoples R China.
部门归属: [Abe, Tomohiro; Chen, Ning; He, Hong-Jian] Tsinghua Univ, Inst Modern Phys, Beijing 100084, Peoples R China; [Abe, Tomohiro; Chen, Ning; He, Hong-Jian] Tsinghua Univ, Ctr High Energy Phys, Beijing 100084, Peoples R China; [He, Hong-Jian] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China; [He, Hong-Jian] Chinese Acad Sci, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China
英文摘要: We study LHC Higgs signatures from the extended electroweak gauge symmetry SU(2) circle times SU(2) circle times U(1). Under this gauge structure, we present an effective UV completion of the 3-site moose model with ideal fermion delocalization, which contains two neutral Higgs states (h, H) plus three new gauge bosons (W', Z'). We study the unitarity, and reveal that the exact E-2 cancellation in the longitudinal VLVL scattering amplitudes is achieved by the joint role of exchanging both spin-1 new gauge bosons W'/Z' and spin-0 Higgs bosons h/H. We identify the lighter Higgs state It with mass 125 GeV, and derive the unitarity bound on the mass of heavier Higgs boson H. The parameter space of this model is highly predictive. We study the production and decay signals of this 125 GeV Higgs boson h at the LHC. We demonstrate that the h Higgs boson can naturally have enhanced signals in the diphoton channel gg -> h -> gamma gamma, while the event rates in the reactions gg -> h -> WW* and gg -> h -> ZZ* are generally suppressed relative to the SM expectation. Searching the h Higgs boson via the associated production and the vector boson fusions are also discussed for our model. We further analyze the LHC signals of the heavier Higgs boson H as a new physics discriminator from the SM. For wide mass-ranges of H, we derive constraints from the existing LHC searches, and study the discovery potential of H at the LHC (8 TeV) and LHC (14 TeV).
资助者: NSF of China [11275101, 10625522, 10635030, 11135003]; National Basic Research Program of China [2010CB 833000]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000315583600001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15449
Appears in Collections:理论物理所2013年知识产出 _期刊论文

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Recommended Citation:
Abe, T,Chen, N,He, HJ. LHC Higgs signatures from extended electroweak gauge symmetry[J]. JOURNAL OF HIGH ENERGY PHYSICS,2013(1):82.
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