论文标题
HIGGS介导的双hot子产生NLO的信号背景干扰效应
Signal-background interference effects in Higgs-mediated diphoton production beyond NLO
论文作者
论文摘要
在本文中，我们考虑了LHC的HIGGS介导的双hot子产生中的信号背景干扰效应。在回顾了早期的作品之后，这些作品显示了如何使用这些效果来限制Higgs玻色子总衰减宽度之后，我们为干扰和相关可观察物的NLO准确性提供了预测，并研究了QCD辐射校正对HIGGS宽度宽度确定的影响。特别是，我们使用所谓的软文近似值来估计QCD中NNLO的干扰效应。这些效应的纳入将双霍顿通道中的HIGG总横截面的NNLO预测减少了约1.7％。我们详细研究了QCD校正对Higgs-Boson线形及其对HIGGS宽度提取的影响的影响。假设实验分辨率约为150 〜MEV，对Higgs-Boson线形的干扰诱导的修饰进行了大约150 〜MEV，我们的NNLO分析表明，可以将Higgs-Boson的总宽度限制为其标准模型值的10-20倍。
In this paper we consider signal-background interference effects in Higgs-mediated diphoton production at the LHC. After reviewing earlier works that show how to use these effects to constrain the Higgs boson total decay width, we provide predictions beyond NLO accuracy for the interference and related observables, and study the impact of QCD radiative corrections on the Higgs width determination. In particular, we use the so-called soft-virtual approximation to estimate interference effects at NNLO in QCD. The inclusion of these effects reduce the NNLO prediction for the total Higgs cross-section in the diphoton channel by about 1.7%. We study in detail the impact of QCD corrections on the Higgs-boson line-shape and its implications for the Higgs width extraction. Assuming an experimental resolution of about 150~MeV on interference-induced modifications of the Higgs-boson line-shape, our NNLO analysis shows that one could constrain the Higgs-boson total width to about 10-20 times its Standard Model value.
