QCD中与矢量玻色子相关的完全微分希格斯对的产生

Chong-Sheng Li, Hai Tao Li, Jian Wang
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引用次数: 0

摘要

希格斯自耦合是阐明电弱对称性破缺机制的标准模型中的一个重要参数,它可以通过强子对撞机产生希格斯玻色子对来测量。我们提出了在强子对撞机上与大质量规范玻色子相关的希格斯玻色子对产生的完全微分NNLO QCD计算。对于$Whh$生产,NNLO效应显著降低了尺度不确定性,并且在大横向动量区域是相当大的。对于$Zhh$生产,NNLO效应使NLO总横截面增加了$ 20% ~ $ 50%,并改变了NLO运动分布的形状。从实验中提取自耦合的影响是显著的。这些理论结果可用于今后的实验分析。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fully Differential Higgs Pair Production in Association With a Vector Boson at NNLO in QCD
The Higgs self-coupling is an important parameter in the standard model to clarify the electroweak symmetry breaking mechanism, which can be measured via Higgs boson pair productions at hadron colliders. We present a fully differential NNLO QCD calculation of the Higgs boson pair production in association with a massive gauge boson at hadron colliders. For $Whh$ production, the NNLO effects reduce the scale uncertainties significantly, and are sizeable in the large transverse momentum region. For $Zhh$ production, the NNLO effects enhance the NLO total cross sections by $20\%- 50\%$, and change the shape of NLO kinematic distributions. The impact on the extraction of the self-coupling from experiments is significant. These theoretical results can be utilised in future experimental analysis.
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