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题名: Top SU(5) models: Baryon and lepton number violating resonances at the LHC
作者: Chakdar, S ;  Li, TJ ;  Nandi, S ;  Rai, SK
刊名: PHYSICAL REVIEW D
出版日期: 2013
卷号: 87, 期号:9, 页码:96002
关键词: GAUGE SYMMETRIES ;  3RD FAMILY ;  QUARK ;  FORCES ;  COLOR ;  UNITY
学科分类: Physics
通讯作者: Chakdar, S (reprint author), Oklahoma State Univ, Dept Phys, Stillwater, OK 74078 USA.
部门归属: [Chakdar, Shreyashi; Nandi, S.] Oklahoma State Univ, Dept Phys, Stillwater, OK 74078 USA; [Chakdar, Shreyashi; Nandi, S.] Oklahoma State Univ, Oklahoma Ctr High Energy Phys, Stillwater, OK 74078 USA; [Li, Tianjun] Chinese Acad Sci, State Key Lab Theoret Phys, Beijing 100190, Peoples R China; [Li, Tianjun] Chinese Acad Sci, Inst Theoret Phys, KITPC, Beijing 100190, Peoples R China; [Li, Tianjun] Texas AM Univ, George P & Cynthia W Mitchell Inst Fundamental Ph, College Stn, TX 77843 USA; [Rai, Santosh Kumar] Harish Chandra Res Inst, Reg Ctr Accelerator Based Particle Phys, Allahabad 211019, Uttar Pradesh, India
英文摘要: We propose minimal and renormalizable nonsupersymmetric top SU(5) models where the SU(5)(C) X SU(3)'(C) X SU(2)'(L) X U(1)'(Y) gauge symmetry is broken down to the Standard Model gauge symmetry at the TeV scale. The first two families of the Standard Model fermions are charged under SU(3)'C X SU(2)'(L) X U(1)'(Y), while the third family is charged under SU(5). In the minimal top SU(5) model, we show that the quark Cabibbo-Kobayashi-Maskawa mixing matrix can be generated via dimension-five operators, and the proton decay problem can be solved by fine-tuning the coefficients of the higher-dimensional operators at the order of 10(-4). In the renormalizable top SU(5) model, we can explain the quark Cabibbo-Kobayashi-Maskawa mixing matrix by introducing vectorlike particles, and we do not have the proton decay problem. The models give rise to leptoquark and diquark gauge bosons which violate both lepton and baryon numbers involving the third-family quarks and leptons. The current experimental limits for these particles is well below the TeV scale. We also discuss the productions and decays of these new gauge bosons, and their ensuing signals, as well as their reach at the LHC.
资助者: Natural Science Foundation of China [10821504, 11075194, 11135003]; United States Department of Energy [DE-FG03-95-Er-40917, DE-FG02-04ER41306]; Department of Atomic Energy, Government of India
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000318474300004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15368
Appears in Collections:理论物理所2013年知识产出 _期刊论文

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Recommended Citation:
Chakdar, S,Li, TJ,Nandi, S,et al. Top SU(5) models: Baryon and lepton number violating resonances at the LHC[J]. PHYSICAL REVIEW D,2013,87(9):96002.
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