论文标题
两步电动对称性破坏：理论符合实验
Two-Step Electroweak Symmetry-Breaking: Theory Meets Experiment
论文作者
论文摘要
我们研究了超额零SU（2）三重量表标量的现象学，其存在是由两步电动对称性破坏的动机。我们认为三胞胎稳定并有助于暗物质密度，或者它们通过与标准模型希格斯玻色子混合而腐烂的可能性。前者受到LHC上消失的带电轨道搜索的限制，并通过暗物质直接检测实验，而后者则受现有的Multilepton Collider搜索的约束。我们发现，直接检测搜索将排除涉及带有负二次术语的稳定三重态的两步电动相过渡，而质量小于$ 230 \ \ \ \ mathrm {gev} $的不稳定的三重态排除在外，以$ 95 \％$ $ $ $ $ $ $置信度排除。
We study the phenomenology of a hypercharge-zero SU(2) triplet scalar whose existence is motivated by two-step electroweak symmetry-breaking. We consider both the possibility that the triplets are stable and contribute to the dark matter density, or that they decay via mixing with the standard model Higgs boson. The former is constrained by disappearing charged track searches at the LHC and by dark matter direct detection experiments, while the latter is constrained by existing multilepton collider searches. We find that a two-step electroweak phase transition involving a stable triplet with a negative quadratic term is ruled out by direct detection searches, while an unstable triplet with a mass less than $230\ \mathrm{GeV}$ is excluded at $95\%$ confidence level.
