分层与简并2 HDM：运行2开始时的LHC运行1遗留问题
Hierarchical vs Degenerate 2HDM: The LHC Run 1 Legacy at the Onset of Run 2
摘要：
目前对LHC运行1后允许的双希格斯偶极模型（2 HDM）参数空间的讨论和运行2的前景通常是在新标量的准简并谱的背景下进行的。在这里，我们讨论的一般情况下的2 HDM与非退化谱的新标量。从宇宙学的角度来看，这是非常有动机的，因为它自然会导致强烈的一阶电弱相变，可以解释宇宙中的物质-反物质不对称性。虽然希格斯信号强度测量的约束条件没有改变，但一旦考虑非简并谱，搜索新标量态的约束条件就会发生显着修改。
英文摘要：
Current discussions of the allowed two-Higgs-doublet model (2HDM) parameter space after LHC Run 1 and the prospects for Run 2 are commonly phrased in the context of a quasi-degenerate spectrum for the new scalars. Here we discuss the generic situation of a 2HDM with a non-degenerate spectrum for the new scalars. This is highly motivated from a cosmological perspective since it naturally leads to a strongly first order electroweak phase transition that could explain the matter-antimatter asymmetry in the Universe. While constraints from measurements of Higgs signal strengths do not change, those from searches of new scalar states get modified dramatically once a non-degenerate spectrum is considered.
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