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arXiv 1308.3166hep-ph
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$h^0\rightarrowγγ$振幅的规范不变性

Gauge invariance of the $h^0\rightarrowγγ$ amplitude

Pior H. Chankowski, Adrian Lewandowski

摘要:

我们指出,由于三线性耦合和希格斯玻色子质量之间的特殊关系,$h^0\rightarrowγγ$衰变的单圈振幅是规范不变的。这个关系式只能从由标量场的势实现的规范对称性破缺模式中得出,而不能从它的特定形式得出。这使得在最小超对称模型(MSSM)中对$h^0\rightarrowγγ$振幅的计算看似不一致是合理的,在最小超对称模型中,人们从例如单圈有效势中获取较轻的希格斯玻色子的质量。

英文摘要:

We point out that the one-loop amplitude of the $h^0\rightarrowγγ$ decay is gauge invariant owing to a particular relation between the trilinear couplings and the Higgs boson mass. This relation follows only from the gauge symmetry breaking pattern realized by the potential of the scalar fields and not on its specific form. This allows to justify the seemingly inconsistent calculation of the $h^0\rightarrowγγ$ amplitude in the minimal supersymmetric model (MSSM) in which one takes the mass of the lighter Higgs boson from e.g. the one-loop effective potential.

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