A comparative study of Higgs boson production from vector-boson fusion
A comparative study of Higgs boson production from vector-boson fusion
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DOI：
10.1007/jhep11(2021)108
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发表时间：
2021-05
影响因子：
5.4
通讯作者：
A. Buckley;X. Chen;J. Cruz-Martinez;S. F. Ravasio;T. Gehrmann;E. Glover;S. Hoche;A. Huss;J. Huston;J. Lindert;S. Platzer;M. Schonherr
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作者：
A. Buckley;X. Chen;J. Cruz-Martinez;S. F. Ravasio;T. Gehrmann;E. Glover;S. Hoche;A. Huss;J. Huston;J. Lindert;S. Platzer;M. Schonherr
在大型强子对撞机运行II中获得的数据已经开始探测在高横向动量下希格斯玻色子的产生。未来的数据将提供一个大样本的事件与助推希格斯玻色子拓扑结构，允许详细了解电弱希格斯玻色子加上双喷流生产，特别是矢量玻色子融合模式（VBF）。我们进行了详细的比较希格斯玻色子生产在这个通道中的精度计算，特别强调大希格斯玻色子横动量，和射流半径依赖的横截面。我们研究了次领先阶和次领先次领先阶QCD的固定阶预言，并将结果与NLO加部分子簇射（NLOPS）匹配的计算结果进行了比较。NNLO修正对中心预测的影响是温和的，包含的尺度不确定性为百分之几，这可能会随着运动学削减的实施而增加。我们发现在非Sudakov地区的固定顺序和匹配的计算之间有很好的一致性，各种NLOPS预测也同意在Sudakov政权。我们分析了来自关联产生和胶子-胶子融合的VBF希格斯玻色子产生的背景。在高的希格斯玻色子横动量下，通常用于增强背景上的VBF信号的Higgs jj和/或mjj切割导致效率降低。我们研究这种效果作为射流半径的函数，并使用不同的定义的标记射流。随着希格斯玻色子p T的增加，所有希格斯产生模式的QCD辐射修正都增加，但胶子融合通道的比例较大的增加导致胶子-胶子融合背景减少到电弱希格斯加上两个喷流产生，需要专用的双喷流拓扑结构。我们详细研究了这种效果，并特别对比了中央喷气否决权与全球喷气多重性的要求。
The data taken in Run II at the Large Hadron Collider have started to probe Higgs boson production at high transverse momentum. Future data will provide a large sample of events with boosted Higgs boson topologies, allowing for a detailed understanding of electroweak Higgs boson plus two-jet production, and in particular the vector-boson fusion mode (VBF). We perform a detailed comparison of precision calculations for Higgs boson production in this channel, with particular emphasis on large Higgs boson transverse momenta, and on the jet radius dependence of the cross section. We study fixed-order predictions at next-to-leading order and next-to-next-to-leading order QCD, and compare the results to NLO plus parton shower (NLOPS) matched calculations. The impact of the NNLO corrections on the central predictions is mild, with inclusive scale uncertainties of the order of a few percent, which can increase with the imposition of kinematic cuts. We find good agreement between the fixed-order and matched calculations in non-Sudakov regions, and the various NLOPS predictions also agree well in the Sudakov regime. We analyze backgrounds to VBF Higgs boson production stemming from associated production, and from gluon-gluon fusion. At high Higgs boson transverse momenta, the∆ y jj and/or m jj cuts typically used to enhance the VBF signal over background lead to a reduced efficiency. We examine this effect as a function of the jet radius and using different definitions of the tagging jets. QCD radiative corrections increase for all Higgs production modes with increasing Higgs boson p T, but the proportionately larger increase in the gluon fusion channel results in a decrease of the gluon-gluon fusion background to electroweak Higgs plus two jet production upon requiring exclusive two-jet topologies. We study this effect in detail and contrast in particular a central jet veto with a global jet multiplicity requirement.