Two-loop electroweak corrections to the Higgs-boson decay H→γγ
Two-loop electroweak corrections to the Higgs-boson decay H→γγ
复制标题
对希格斯玻色子衰变 H→γγ 的双环电弱校正
DOI：
10.1016/j.nuclphysb.2005.06.027
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
F. Maltoni
中科院分区：
文献类型：
--
作者：
G. Degrassi;F. Maltoni
本文给出了希格斯玻色子衰变为双光子的宽度的一整套双圈电弱修正。双环贡献涉及弱玻色子和顶夸克的希格斯外部动量的膨胀计算。将这些结果与先前已知的轻费米子贡献相加，我们发现100 μ mH <$150 GeV的希格斯玻色子的总电弱修正是中等和负的，在−4%<$δEW <$0%之间。结合小的正的QCD修正，给出了对单圈结果的总修正，|δEW+QCD| 1.5%。
The complete set of two-loop electroweak corrections to the decay width of the Higgs boson into two photons is presented. Two-loop contributions involving weak bosons and the top quark are computed in terms of an expansion in the Higgs external momentum. Adding these results to the previously known light fermion contributions, we find that the total electroweak corrections for a Higgs boson with 100≲mH≲150 GeV are moderate and negative, between −4%≲δEW≲0%. Combination with the QCD corrections, which are small and positive, gives a total correction to the one-loop results of |δEW+QCD|≲1.5%.