Higgs Decay H -->\gamma\gamma\ through a W Loop: Difficulty with Dimensional Regularization
Higgs Decay H -->\gamma\gamma\ through a W Loop: Difficulty with Dimensional Regularization
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发表时间：
2011-08
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通讯作者：
R. Gastmans;T. Wu;S. Wu
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作者：
R. Gastmans;T. Wu;S. Wu
由于光子没有质量，它不会直接与希格斯粒子耦合。这意味着对衰变H --> \gamma\gamma\的单圈修正必然是有限的。因此，这种校正应该是可计算的，而不需要引入正则化或重影。本文对一个W回路的情况进行了计算。这样得到的结果原来不同意与以前的，众所周知的，它认为，目前的结果是首选，因为它满足解耦定理。这种差异可以追溯到在前面的结果中使用了维度正则化。
Since the photon has no mass, it does not couple directly to the Higgs particle. This implies that the one-loop correction to the decay H --> \gamma\gamma\ is necessarily finite. Therefore, this correction should be calculable without introducing either regularization or ghosts. Such a calculation is carried out in this paper for the case of one W loop. The result obtained this way turns out not to agree with the previous, well-known one, and it is argued that the present result is to be preferred because it satisfies the decoupling theorem. The discrepancy can be traced to the use of dimensional regularization in the previous result.