CP守恒2 HDM中强一级电弱相变的再研究
Strong First Order Electroweak Phase Transition in the CP-Conserving 2HDM Revisited
摘要：
希格斯玻色子的发现标志着粒子物理学的一个里程碑。然而，仍然有许多悬而未决的问题，不能回答的标准模型（SM）。例如，通过重子生成在宇宙中观察到的物质-反物质不对称性的产生只能在SM中定性地解释。一个简单的扩展SM兼容当前的理论和实验的限制是由2-希格斯双重模型（2 HDM），其中第二个希格斯双重添加到希格斯部门。我们研究了在CP守恒的2 HDM I型和II型中，CP偶希格斯玻色子玻色子与类SM希格斯玻色子玻色子等同的情况下，强一级电弱相变的可能性.重整化，我们应用于循环校正的希格斯势，使我们能够有效地扫描2 HDM参数空间，同时考虑到所有相关的理论和最新的实验约束。系统地分析了与所施加的约束和强电弱相变相容的2 HDM参数区域。我们的研究结果表明，有一个强的相变和对撞机现象与可测试的影响，在大型强子对撞机搜索的要求之间的相互作用。
英文摘要：
The discovery of the Higgs boson by the LHC experiments ATLAS and CMS has marked a milestone for particle physics. Yet, there are still many open questions that cannot be answered within the Standard Model (SM). For example, the generation of the observed matter-antimatter asymmetry in the universe through baryogenesis can only be explained qualitatively in the SM. A simple extension of the SM compatible with the current theoretical and experimental constraints is given by the 2-Higgs-Doublet Model (2HDM) where a second Higgs doublet is added to the Higgs sector. We investigate the possibility of a strong first order electroweak phase transition in the CP-conserving 2HDM type I and type II where either of the CP-even Higgs bosons is identified with the SM-like Higgs boson. The renormalisation that we apply on the loop-corrected Higgs potential allows us to efficiently scan the 2HDM parameter space and simultaneously take into account all relevant theoretical and up-to-date experimental constraints. The 2HDM parameter regions found to be compatible with the applied constraints and a strong electroweak phase transition are analysed systematically. Our results show that there is a strong interplay between the requirement of a strong phase transition and collider phenomenology with testable implications for searches at the LHC.
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