Gluon-induced Higgs-strahlung at next-to-leading order QCD
Gluon-induced Higgs-strahlung at next-to-leading order QCD
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DOI：
10.1007/jhep02(2013)078
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发表时间：
2013-02-01
影响因子：
5.4
通讯作者：
Zirke, Tom J. E.
中科院分区：
文献类型：
--
作者：
Altenkamp, Lukas;Dittmaier, Stefan;Zirke, Tom J. E.
在QCD中以NLO精度计算了胶子诱导对希格斯玻色子和Z玻色子相关产生的贡献。它们对这一过程的横截面作出了重大贡献。在有限顶夸克质量和底夸克质量为零的情况下，计算了微扰修正因子（K因子）。结果与已知的胶子融合过程gg -> H的结果的定性相似性允许得出这样的结论：通过该K因子重新标度LO预测导致可靠的NLO结果和由于遗漏高阶微扰效应而导致的实际误差估计。我们考虑了总的包容截面以及一个增强的希格斯玻色子的情况下，希格斯玻色子的横向动量被限制到值p（T，H）> 200 GeV。在这两种情况下，我们发现大的校正因子K在大多数参数空间中近似为2。
Gluon-induced contributions to the associated production of a Higgs and a Z boson are calculated with NLO accuracy in QCD. They constitute a significant contribution to the cross section for this process. The perturbative correction factor (K-factor) is calculated in the limit of in finite top-quark and vanishing bottom-quark masses. The qualitative similarity of the results to the well-known ones for the gluon-fusion process gg -> H allows to conclude that rescaling the LO prediction by this K-factor leads to a reliable NLO result and realistic error estimate due to missing higher-order perturbative effects. We consider the total inclusive cross section as well as a scenario with a boosted Higgs boson, where the Higgs boson's transverse momentum is restricted to values p(T,H) > 200 GeV. In both cases, we find large correction factors K approximate to 2 in most of the parameter space.