论文标题
带有暗物质的三环中微子质量模型中的电子生生成
Electroweak baryogenesis in the three-loop neutrino mass model with dark matter
论文作者
论文摘要
在最初在物理中提出的模型中评估了宇宙的重子不对称性。莱特牧师。 102（2009）051805，其中主要中微子的主要中微子是由三环图生成的，该图由附加标量玻色子组成，包括暗物质候选者，在不间断的$ z_2 $对称性下是奇怪的。为了使该模型包括多个CP侵入阶段，我们不强加原始模型中施加的柔和损坏的$ Z_2 $对称性，以避免在树级上避免改变风味的中性电流。取而代之的是，为简单起见，我们假设Yukawa相互作用中的风味对准结构。我们还简单地假设希格斯电位中的对齐结构，以便希格斯耦合与树级的SM中的耦合一致。在这些现象学简化下，该模型仍然包含多个CP侵入阶段。通过使用它们之间的破坏性干扰，它与电动偶极矩测量的严格约束兼容，以生成观察到的重子不对称以及electroweak baryogenogeny的情况。我们展示了一个基准场景，可以同时解释宇宙的中微子质量，暗物质和重子不对称性，并可以满足所有其他可用的实验数据。还讨论了该模型的一些现象学预测。
Baryon asymmetry of the Universe is evaluated in the model originally proposed in Phys. Rev. Lett. 102 (2009) 051805, where Majorana masses of neutrinos are generated via three-loop diagrams composed of additional scalar bosons including the dark matter candidate which is odd under an unbroken $Z_2$ symmetry. In order for the model to include multiple CP-violating phases, we do not impose the softly broken $Z_2$ symmetry imposed in the original model to avoid the flavor-changing neutral current at tree level. Instead, for simplicity, we assume the flavor alignment structure in the Yukawa interactions. We also simply assume the alignment structure in the Higgs potential so that the Higgs couplings coincide with those in the SM at tree level. Under these phenomenological simplifications, the model still contains multiple CP-violating phases. By using destructive interferences among them, it is compatible with the stringent constraint from the electric dipole moment measurements to generate the observed baryon asymmetry along with the scenario of electroweak baryogenesis. We show a benchmark scenario which can explain neutrino mass, dark matter and baryon asymmetry of the universe simultaneously and can satisfy all the other available experimental data. Some phenomenological predictions of the model are also discussed.
