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arXiv 1303.6392hep-ph
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希格斯玻色子玻色子衰变为不同味道的赝标介子对

Decays of Higgs Boson into Pseudoscalar Meson Pair of Different Flavours

Swee-Ping Chia

摘要:

在标准模型中,夸克与希格斯粒子的耦合并没有发生在树的层次上。然而,它是由单回路效应引起的。本文给出了Hooft-Feynman规范中Higgs-penguin顶点的精确计算。顶点的重正化是由Chia和Chong的一个处方所实现的,该处方给出了与采用Ward-Takahashi恒等式所获得的计数器项相同的表达式。得到了Higgs-penguin顶点的壳层上顶点函数,并研究了它对Higgs质量的依赖性.计算了希格斯玻色子衰变为不同味道的赝标介子对Kpi和BK的过程,赝标介子与夸克的耦合是通过γ ~ 5耦合实现的。衰变率被发现是非常小的。

英文摘要:

The flavour-changing quark-Higgs coupling does not arise at the tree level in the Standard Model. It is, however, induced by one-loop effects. In this paper, we present an exact calculation of the Higgs-penguin vertex in the tHooft-Feynman gauge. Renormalization of the vertex is effected by a prescription by Chia and Chong which gives an expression for the counter term identical to that obtained by employing Ward-Takahashi identity. The on-shell vertex function for the Higgs-penguin vertex is obtained, and its dependence on Higgs mass is investigated. Our calculation is applied to the following process: decays of Higgs boson into pseudoscalar meson pair of different flavours: Kpi and BK. The coupling of pseudoscalar meson to quark is effected through a gamma5 coupling. The decay rates are found to be very small.

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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