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外文期刊>The journal of high energy physics
>Interference effects for $$ Ho W;Wo ell u q{overline{q}}^{prime } $$ and $$ Ho ZZo ell overline{ell}qoverline{q} $$ searches in gluon fusion at the LHC
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Interference effects for $$ Ho W;Wo ell u q{overline{q}}^{prime } $$ and $$ Ho ZZo ell overline{ell}qoverline{q} $$ searches in gluon fusion at the LHC
A bstract Signal-background interference effects are studied for H → W W and H → ZZ searches in gluon fusion at the LHC. More specifically, the interference in the channels with semileptonic weak boson pair decay is analysed for light and heavy Higgs masses with minimal and realistic experimental selection cuts. In the semileptonic decay modes, the interference is affected by tree-level background contributions enhanced by 1 /e _(2) relative to the gluon-fusion continuum background in the fully leptonic decay modes. We find that for both light and heavy Higgs masses the interference with the loop-induced weak-boson pair background dominates over the interference with the tree-level weak-boson plus jets background for a range of selection cuts. We therefore conclude that higher-order background contributions can induce leading interference effects. With appropriate background suppression cuts the interference can be reduced to the 10% level for heavy Higgs masses, and to the per mille level for the light SM Higgs.
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机译：在LHC的Gluon Fusion中研究了Bstract信号背景干扰效应，H→W W和H→ZZ搜索。更具体地，通过最小且现实的实验选择切割，分析了具有半岩间弱玻色子对衰减的通道的干扰。在半透明衰减模式下，干扰受到完全Lepton衰减模式中的胶合融合连续体背景的1 / E _（2）增强的树级背景贡献的影响。我们发现，对于光明和重金英的群体，对环路引起的弱玻色子对背景的干扰占据了各种选择切割范围的树级弱玻色子加上射流背景的干扰。因此，我们得出结论，高阶背景贡献可以引起领先的干扰效应。通过适当的背景抑制切割，可以将干扰减少到重型HIGGS质量的10％水平，并为光SM HIGG的按摩水平。
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