The flavor-changing rare top decays t→cVV in topcolor-assisted technicolor theory

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• 作者：Yue ; Chongxing ; Lu ; Gongru ; Xu ; Qingjun ; Liu ; Guoli ; Gao ; Guangping
• 刊名：Physics Letters B
• 出版年：2001
• 期刊代码：58_03702693
• 类别：ph
• 出版时间：May 31, 2001
• 卷：508
• 期：3-4
• 页码：290-294
• 文件大小：76.1 K

摘要

In the framework of topcolor-assisted technicolor (TC2) theory, we calculate the contributions of the scalars (the neutral top-pion π_t⁰ and the top-Higgs h_t⁰) to the flavor-changing rare top decays t→cVV(V=W,g, γ or Z). Our results show that h_t⁰ can enhance the standard model B_r^SM(t→cWW) by several orders of magnitude for most of the parameter space. The peak of the branching ratio resonance emerges when the top-Higgs mass is between 2m_W and m_t. The branching ratio B_r(t→cWW) can reach 10⁻³ in the narrow range.