Searching for dark matter production in Higgs boson decays at CMS

暗物质(DM)的性质是基本粒子物理学中最紧迫和最悬而未决的问题之一。暗物质的一个吸引人的解释是一种新的、大质量的基本粒子，它与标准模型(SM)粒子有弱耦合。如果是这样的话，我们就有理由认为耦合到质量上的希格斯玻色子会以一种“看不见的衰变”的方式衰变成一对DM粒子。这个项目的目的是在CMS收集的大型强子对撞机Run-II的完整数据集中搜索看不见的希格斯衰变，并为寻找LHC Run-III做准备。为了最大限度地提高对隐形希格斯衰变的敏感度，该项目旨在进行一项分析，涵盖所有SM希格斯生产过程，并对所有渠道进行一致的系统处理。

The nature of dark matter (DM) is one of the most pressing and unresolved questions in elementary particle physics. An attractive explanation for dark matter is a new, massive elementary particle with weak couplings to Standard Model (SM) particles. If this is the case it is reasonable to assume that the Higgs boson, which couples to mass, could decay to a pair of DM particles in an "invisible decay". The aim of this project is to search for invisible Higgs decays in the full LHC Run-II dataset collected by CMS and preparing searches for LHC Run-III. In order to maximise sensitivity to to invisible Higgs decays this project aims to carry out an analysis that covers all SM Higgs production processes with a consistent systematic treatment of all channels.