Mixed QCD-electroweak contributions to Higgs-plus-dijet production at the CERN LHC
Mixed QCD-electroweak contributions to Higgs-plus-dijet production at the CERN LHC
复制标题
混合 QCD 电弱对 CERN LHC 希格斯加二射流生产的贡献
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
B. Jager
中科院分区：
文献类型：
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作者：
A. Bredenstein;K. Hagiwara;B. Jager
我们分别计算了通过胶子聚变和矢量玻色子聚变产生$Hjj$的干涉效应，超出了树的水平。我们重现了最近在文献中讨论的结果，但通过包括以前未考虑的一类图表，超出了这种计算。特别注意发展一个数值稳定和灵活的部级蒙特卡罗程序，使我们能够研究横截面和运动分布在实验相关的选择切割。发现环路诱导的干涉贡献表现出与矢量玻色子融合形状不同的运动学分布。然而，由于不同夸克风味贡献之间的干涉截面较小且相互抵消，它们对信号过程的影响在相空间的所有区域都可以忽略不计。
We present a calculation of interference effects in $Hjj$ production via gluon fusion and via vector boson fusion, respectively, beyond tree level. We reproduce results recently discussed in the literature, but go beyond this calculation by including a class of diagrams not considered previously. Special care is taken in developing a numerically stable and flexible parton-level Monte Carlo program which allows us to study cross sections and kinematic distributions within experimentally relevant selection cuts. Loop-induced interference contributions are found to exhibit kinematical distributions different in shape from vector boson fusion. Because of the small interference cross section and cancellation among different quark flavor contributions, their impact on the signal process is found to be negligible in all regions of phase space, however.