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题名: Top-quark FCNC decay t -> cgg in topcolor-assisted technicolor model
作者: Zhang, Huan-Jun
刊名: PHYSICAL REVIEW D
出版日期: 2008
卷号: 77, 期号:5, 页码:-
关键词: MINIMAL SUPERSYMMETRIC MODEL ;  CHANGING NEUTRAL COUPLINGS ;  HADRON COLLIDERS ;  STANDARD MODEL ;  LINEAR COLLIDERS ;  RARE DECAYS ;  CERN LHC ;  UNCONSTRAINED MSSM ;  FERMILAB TEVATRON ;  SYMMETRY-BREAKING
学科分类: Physics
通讯作者: Zhang, HJ , Henan Normal Univ, Dept Phys, Henan 453007, Peoples R China
部门归属: [Zhang, HJ] Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China; [Zhang, HJ] Henan Normal Univ, Dept Phys, Henan 453007, Peoples R China
英文摘要: The topcolor-assisted technicolor (TC2) model predicts several pseudoscalars called top-pions and at loop level they can induce the flavor-changing neutral-current (FCNC) top-quark decay t --> cgg which is extremely suppressed in the standard model (SM). We find that in the allowed parameter space the TC2 model can greatly enhance such a FCNC decay and push the branching ratio up to 10(-3), which is much larger than the predictions in the SM (10(-9)) and in the minimal supersymmetric model (10(-4)). We also compare the result with the two-body FCNC decay t --> cg and find that the branching ratio of t --> cgg is at the same order as t --> cg. Such enhanced FCNC top-quark decays may serve as a good probe of the TC2 model at the future top-quark factory.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000254544200090
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5568
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Zhang, Huan-Jun. Top-quark FCNC decay t -> cgg in topcolor-assisted technicolor model[J]. PHYSICAL REVIEW D,2008,77(5):-.
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