Li Hai Tao, Yan Bin, Yuan C-P
School of Physics, Shandong University, Jinan, Shandong 250100, China.
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.
Phys Rev Lett. 2023 Jul 28;131(4):041802. doi: 10.1103/PhysRevLett.131.041802.
Discriminating between Higgs production mechanisms can play a crucial role in determining the couplings of Higgs to gauge bosons, probing the nature of electroweak symmetry breaking. We propose a novel method to distinguish the Higgs production mechanisms at the LHC by utilizing the jet charge asymmetry of the two leading forward jets in Higgs plus two jets production. This novel observable provides a way to disentangle the W fusion from the Z fusion and gluon fusion processes for the first time, due to the electric charge correlation of the two leading jets in the events. We show that the Higgs couplings to gauge bosons can be well constrained, and its conclusion does not depend on the other possible new physics effects which modify the Higgs total or partial width. We also discuss the complementary roles between the proposed jet charge asymmetry measurement and the Higgs signal strength measurements at the high luminosity LHC (HL-LHC) in determining the Higgs couplings.
区分希格斯玻色子的产生机制对于确定希格斯玻色子与规范玻色子的耦合、探索电弱对称性破缺的本质可能起着至关重要的作用。我们提出了一种新颖的方法，通过利用希格斯玻色子加双喷注产生过程中两个前导正向喷注的喷注电荷不对称性，来区分大型强子对撞机（LHC）上的希格斯玻色子产生机制。由于事件中两个前导喷注的电荷相关性，这个新颖的可观测量首次提供了一种将W玻色子融合与Z玻色子融合以及胶子融合过程区分开来的方法。我们表明，希格斯玻色子与规范玻色子的耦合可以得到很好的限制，并且其结论不依赖于其他可能修改希格斯玻色子总宽度或部分宽度的新物理效应。我们还讨论了在高亮度大型强子对撞机（HL-LHC）上，所提出的喷注电荷不对称性测量与希格斯玻色子信号强度测量在确定希格斯玻色子耦合方面的互补作用。
