标题： Zh生产，一种约束2HDM的工具 显示英文标题

标题： Zh Production, a Tool to Constrain 2HDM

摘要： 由于SM希格斯玻色子h是2HDM中两个不同质量的中性希格斯玻色子的叠加，因此在SM和2HDM中h和Z的关联产生截面可能不同。在本文中，研究了利用这种差异来发现或限制2HDM的可能性。作为主要结果，在考虑来自LHC实验的可能精确测量的情况下，找到了2HDM类型-II的允许参数空间。结果显示，将这些测量的约束与之前来自直接搜索和味物理对2HDM的约束结合起来，可以排除2HDM参数空间的主要部分。 显示英文摘要

摘要： Since the SM Higgs boson, h, is the superposition of two unequal-mass neutral Higgs bosons in 2HDM, therefore the associated production cross section for h and Z in SM and 2HDM can be different. In this paper, the possibility of using this difference to discover or constrain 2HDM is studied. As a main result, the allowed parameter space of 2HDM type-II is found in the light of possible precise measurements from the LHC experiments. It is shown that combination of the constraints from these measurements with the previous constraints on 2HDM, from direct search and flavour physics, can rule out the main part of the 2HDM parameter space.