Two-loop mixed QCD-EW corrections to gg → Hg
Two-loop mixed QCD-EW corrections to gg → Hg
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DOI：
10.1007/jhep11(2020)045
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发表时间：
2020-07
影响因子：
5.4
通讯作者：
M. Bonetti;E. Panzer;V. Smirnov;L. Tancredi
中科院分区：
文献类型：
--
作者：
M. Bonetti;E. Panzer;V. Smirnov;L. Tancredi
本文计算了胶子通过轻夸克圈聚变产生希格斯玻色子和胶子的双圈混合QCD-EW修正。相关的四点函数与内部质量传播子表示为多重多项式代数参数。我们进行计算的积分费曼参数，独立地，由微分方程的方法。我们计算两个独立的螺旋振幅的过程中，我们发现，他们都是有限的。此外，我们观察到一个重量下降时，所有胶子有相同的螺旋度。我们还提供了一个简化的表达式的所有加螺旋度振幅，这是优化的快速和可靠的数值评估的物理区域。
We compute the two-loop mixed QCD-Electroweak (QCD-EW) corrections to the production of a Higgs boson and a gluon in gluon fusion through a loop of light quarks. The relevant four-point functions with internal massive propagators are expressed as multiple polylogarithms with algebraic arguments. We perform the calculation by integration over Feynman parameters and, independently, by the method of differential equations. We compute the two independent helicity amplitudes for the process and we find that they are both finite. Moreover, we observe a weight drop when all gluons have the same helicity. We also provide a simplified expression for the all-plus helicity amplitude, which is optimised for fast and reliable numerical evaluation in the physical region.