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arXiv 2002.01688hep-phhep-ex
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限制质子中Higgs的价贡献

Constraining the Higgs valence contribution in the proton

Simon Fernbach, Lukas Lechner, Axel Maas, Simon Plätzer, Robert Schöfbeck

摘要:

在强相互作用和弱相互作用下的非微扰规范不变性决定了质子中含有来自希格斯粒子的非零价贡献。通过引入一个额外的部分子分布函数(PDF),我们调查的实验结果的预测。Herwig 7事件发生器和参数化CMS探测器模拟被用来获得预测的情况下,相当于LHC运行II的数据集。我们使用这些来评估希格斯PDF对单轻子末态pp->ttbar过程的影响。名义模拟相比,我们得到预期的限制作为一个函数的价希格斯PDF的形状。我们还研究了过程pp->ttZ在部分子水平添加进一步的约束。

英文摘要:

Non-perturbative gauge-invariance under the strong and the weak interactions dictates that the proton contains a non-vanishing valence contribution from the Higgs particle. By introducing an additional parton distribution function (PDF), we investigate the experimental consequences of this prediction. The Herwig 7 event generator and a parametrized CMS detector simulation are used to obtain predictions for a scenario amounting to the LHC Run II data set. We use those to assess the impact of the Higgs PDF on the pp->ttbar process in the single lepton final state. Comparing to nominal simulation we derive expected limits as a function of the shape of the valence Higgs PDF. We also investigate the process pp->ttZ at the parton level to add further constraints.

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