论文标题
中微子 - 漆黑物质模型中的五零纹理在最小的seesaw的框架内
Five-zero texture in neutrino-dark matter model within the framework of minimal extended seesaw
论文作者
论文摘要
我们在最小的seeSAW框架内研究了中微子和暗物质的模型。该模型基于$ a_4 $风味对称性，以及离散的$ z_3 \ times z_4 $对称性，以稳定暗物质并构建所需的质量矩阵，以构成中微子质量。在最终$ 4 \ TIME4 $ Active-Sterile-Sterile质量矩阵中施加了五零纹理，这大大降低了模型中的自由参数。考虑了三个右撇子中微子，其中两个几乎具有退化的质量，这有助于我们通过谐振静脉生成实现男性生成。还考虑了带有质量$ \ sim \ Mathcal {O} $（EV）的单元fermion（无菌中微子），并且我们能够通过中微子振荡数据对活动性 - 微分混合参数进行界限。 Lepton不对称的共振增强是在TEV量表上研究的，我们讨论了考虑风味效应的男生成的几个方面。还研究了一代无菌中微子风味的$0νβ$改善有效质量的可能性。在标量扇区中，复杂单重标量标量的虚构成分表现为潜在的暗物质候选者，同时，复杂标量的实际部分与无菌质量产生的费米昂扇形有关。从各种歼灭过程中分析了深色物质质量区域，并且复杂标量的VEV起着关键作用，以达到右球场上观察到的遗物密度。
We study a model of neutrino and dark matter within the framework of a minimal extended seesaw. This model is based on $A_4$ flavour symmetry along with the discrete $Z_3\times Z_4$ symmetry to stabilize the dark matter and construct desired mass matrices for neutrino mass. Five-zero textures are imposed in the final $4\times4$ active-sterile mass matrix, which significantly reduces free parameter in the model. Three right-handed neutrinos were considered, two of them have nearly degenerate masses which help us to achieve baryogenesis via resonant leptogenesis. A singlet fermion (sterile neutrino) with mass $\sim\mathcal{O}$(eV) is also considered, and we are able to put bounds on active-sterile mixing parameters via neutrino oscillation data. Resonant enhancement of lepton asymmetry is studied at TeV scale, where we discuss a few aspects of baryogenesis considering the flavour effects. Possibility of improvement in effective mass from $0νββ$ in the presence of a single generation of sterile neutrino flavour is also studied within the fermion sector. In the scalar sector, the imaginary component of the complex singlet scalar is behaving as a potential dark matter candidate and simultaneously the real part of the complex scalar is associated with the fermion sector for sterile mass generation. A broad region of dark matter mass is analyzed from various annihilation processes, and the VEV of the complex scalar plays a pivotal role to achieve the observed relic density at the right ballpark.
