Next-To-Leading Order QCD Corrections to Associated Production of a SM Higgs Boson with a Pair of Weak Bosons in the POWHEG-BOX
Next-To-Leading Order QCD Corrections to Associated Production of a SM Higgs Boson with a Pair of Weak Bosons in the POWHEG-BOX
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DOI：
10.1103/physrevd.93.054010
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发表时间：
2015-12
影响因子：
5
通讯作者：
J. Baglio
中科院分区：
文献类型：
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作者：
J. Baglio
2012年在欧洲核子研究中心大型强子对撞机（LHC）发现希格斯玻色子后，对其性质的详细研究，最重要的是其与其他粒子的耦合，已经开始。这是一项非常重要的任务，特别是要测试它是否确实是标准模型（SM）预测的希格斯玻色子。对希格斯玻色子与规范玻色子耦合的精确研究特别重要，需要尽可能多的信息。在POWHEG-BOX框架下，利用次领先阶（NLO）QCD修正，给出了一个SM Higgs玻色子与一对弱玻色子$W^+W^-$，$W^\pm Z$和$ZZ$，以及部分子簇射（PS）的产生截面和微分分布.在喷流微分分布中，NLO QCD修正是显著的，PS效应在低p_T时是相当大的，而在其它分布中，这些效应可以忽略不计。我们还将详细研究影响LHC和未来圆形对撞机强子-强子模式下总生产率的理论不确定性，LHC机器的潜在100 TeV后续：由重整化和因式分解尺度的变化计算的尺度不确定性，部分子分布函数和相关的$\alpha_s$误差以及输入弱玻色子质量的参数不确定性。
After the discovery of a Higgs boson in 2012 at the CERN Large Hadron Collider (LHC) the detailed study of its properties, and most importantly its couplings to other particles, has started. This is a very important task to be completed, in particular to test whether it is indeed the Higgs boson predicted by the Standard Model (SM). The precise study of the Higgs couplings to gauge bosons is of particular importance and requires as much information as possible. In this view this paper provides the next-to-leading order (NLO) QCD corrections to the production cross sections and differential distributions of a SM Higgs boson in association with a pair of weak bosons $W^+W^-$, $W^\pm Z$ and $ZZ$, matched with parton shower (PS) in the POWHEG-BOX framework. The NLO QCD corrections are found to be significant and PS effects are sizable at low $p_T$ in the jet differential distributions, as expected, while these effects are negligible in other distributions. We will also provide a detailed study of the theoretical uncertainties affecting the total production rates at the LHC and at the Future Circular Collider in hadron-hadron mode, the potential 100 TeV follow-up of the LHC machine: the scale uncertainty calculated by the variation of the renormalization and factorization scales, the parton distribution function and related $\alpha_s$ errors as well as the parametric uncertainties on the input weak boson masses.