Top Quark Decay t -> cb(b)over-bar in Topcolor-Assisted Technicolor Models

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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
刊名	CHINESE PHYSICS LETTERS
	2009
卷号	26 期号:10 页码:-
关键词	Minimal Supersymmetric Model Standard Model Linear Colliders Rare Decays 3rd-family Quarks Fcnc Processes Physics Susy Lhc Condensation
ISSN号	0256-307X
英文摘要	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.
学科主题	Physics
URL标识	查看原文
WOS记录号	WOS:000270303200021
公开日期	2012-08-02
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/5236]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Liu, GL , Zhengzhou Univ, Dept Phys, Zhengzhou 450001, Peoples R China
推荐引用方式 GB/T 7714	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):-.