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arXiv 0802.1949hep-ph
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有效理论中顶夸克的双味破坏衰变

Double Flavor Violating Top Quark Decays in Effective Theories

Carmine Pagliarone, A. Fernandez, J. J. Toscano

摘要:

利用有效拉格朗日方法,以一种与模型无关的方式,探讨了探测双味违反顶夸克跃迁$t \to u_iτμ$($u_i=u,c$)的可能性。低能数据,高精度测量,和当前的实验限制被用来约束$tu_iH$和$Hτμ$顶点,然后计算分支比BR $(t \to u_iτμ)$。如果在标准模型BR中,$(t \to u_iτμ)$是$10^{-13}$ $-10^{-14}$的量级,那么希格斯介导的双味违反顶夸克衰变可以发生,对于114.4 GeV的$/c^2$ $< m_H<$ $2m_W$,分支比从$10^{-3}$到$10^{-4}$,这是在欧洲核子研究中心大型强子对撞机的范围内。

英文摘要:

The possibility of detecting double flavor violating top quark transitions $t \to u_iτμ$ ($u_i=u,c$) is explored in a model--independent manner, using the effective Lagrangian approach. Low--energy data, on high precision measurements, and current experimental limits are used to constraint the $tu_iH$ and $Hτμ$ vertices and then to calculate the branching ratio BR$(t \to u_iτμ)$. If in the Standard Model BR$(t \to u_iτμ)$ is of the order of $10^{-13}$$-10^{-14}$, higgs--mediated double flavor violating top quark decays can occur with branching ratios ranging from $10^{-3}$ to $10^{-4}$ for 114.4 GeV$/c^2$ $< m_H<$ $2m_W$, that is at the reach of the CERN Large Hadron Collider.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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