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arXiv 0812.0727hep-ph
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双Higgs双重态模型III中轻子味破坏$τ^- \to μ^- V^0$衰变

Lepton Flavor Violating $τ^- \to μ^- V^0$ Decays in the Two Higgs Doublet Model III

Wenjun Li, Yanqin ma, Gongwei Liu, Wei Guo

摘要:

本文在双Higgs二重态模型(2HDM)III的框架下研究了轻子味破坏$τ^- \to μ^- V^0(V^0=ρ^0,ϕ,ω)$衰变。我们提出了一个计算的$γ-$,$Z$企鹅和盒图的贡献,并作出分析,他们的影响。我们的研究结果表明,在$γ-$企鹅中,环中带有中性希格斯粒子的企鹅比环中带有带电希格斯粒子的企鹅大得多。我们发现模型参数$λ_{τμ}$被严格约束在$O(10^{-3})$量级,并且这些衰变的分支比在实验测量下是可用的。由于B厂的高光度,它们有相当大的能力发现这些LFV过程。另一方面,这些过程也可以为未来的研究提供一些有价值的信息,并为检验2HDM III模型提供可靠的证据。

英文摘要:

In this paper, the lepton flavor violating $τ^- \to μ^- V^0(V^0=ρ^0,ϕ,ω)$ decays are studied in the framework of the two Higgs doublet model(2HDM) III. We present a computation of the the $γ-$, $Z$ penguin and box diagrams contributions, and make an analysis of their impacts. Our results show that, among the $γ-$ penguins, the penguins with neutral Higgs in the loop are very larger than those with charged Higgs in the loop. We find that the model parameter $λ_{τμ}$ is tightly constrained at the order of $O(10^{-3})$ and the branching ratios of these decays are available at the experiment measure. With the high luminosity, the B factories have considerable capability to find these LFV processes. On the other hand, these processes can also provide some valuable information to future research and furthermore present the reliable evidence to test the 2HDM III model.

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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