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Top Quark Decay t -> cb(b)over-bar in Topcolor-Assisted Technicolor Models
Liu Guo-Li; Liu, GL , Zhengzhou Univ, Dept Phys, Zhengzhou 450001, Peoples R China
2009
发表期刊CHINESE PHYSICS LETTERS
ISSN0256-307X
卷号26期号:10页码:-
摘要The topcolor-assisted technicolor (TC2) model predicts the existence of the top-pions and the CP-even top-Higgs with large flavor-changing couplings to the top quark, which at tree-level can mediate the top quark three-body decay t -> cb (b) over bar. We study this decay, show the dependence of the decay rate on the relevant TC2 parameters and compare the results with the predictions in the minimal supersymmetric model. We find that the decay rate in the TC2 model is much larger than that in the minimal supersymmetric model if the new particles are not too heavy. However, in consideration of the CDF and the LEP experiment limits, the top-pion mass is greater than 340 GeV in a more realistic parameter space, so the decay width of the channel t -> cb (b) over bar intermediated by top-pions will be depressed greatly and difficult to be detected at the future collider. Thus, to observe this channel at the future collider, considering the top-higgs contribution may be the possible way when the masses of the top-pions and the top-higgs are not degenerate.
部门归属[Liu, GL] Zhengzhou Univ, Dept Phys, Zhengzhou 450001, Peoples R China; [Liu, GL] Chinese Acad Sci, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China
关键词Minimal Supersymmetric Model Standard Model Linear Colliders Rare Decays 3rd-family Quarks Fcnc Processes Physics Susy Lhc Condensation
学科领域Physics
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收录类别SCI
WOS记录号WOS:000270303200021
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5236
专题理论物理所SCI论文
通讯作者Liu, GL , Zhengzhou Univ, Dept Phys, Zhengzhou 450001, Peoples R China
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Liu Guo-Li,Liu, GL , Zhengzhou Univ, Dept Phys, Zhengzhou 450001, Peoples R China. Top Quark Decay t -> cb(b)over-bar in Topcolor-Assisted Technicolor Models[J]. CHINESE PHYSICS LETTERS,2009,26(10):-.
APA Liu Guo-Li,&Liu, GL , Zhengzhou Univ, Dept Phys, Zhengzhou 450001, Peoples R China.(2009).Top Quark Decay t -> cb(b)over-bar in Topcolor-Assisted Technicolor Models.CHINESE PHYSICS LETTERS,26(10),-.
MLA Liu Guo-Li,et al."Top Quark Decay t -> cb(b)over-bar in Topcolor-Assisted Technicolor Models".CHINESE PHYSICS LETTERS 26.10(2009):-.
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