Asymmetric Mediator in Scotogenic Model
Asymmetric Mediator in Scotogenic Model
复制标题
Scoogenic模型中的不对称中介
DOI：
10.1016/j.physletb.2022.137627
复制
发表时间：
2022
影响因子：
4.4
通讯作者：
M. Yamanaka
中科院分区：
文献类型：
--
作者：
K. Asai;Y. Sakai;J. Sato;Y. Takanishi;M. Yamanaka
该模型是具有Z2对称性的标准模型(SM)，加入了Z2奇数右手Majorana中微子和SU(2)L双标量场。我们用一个在暗物质中起作用的Z2奇单重态标量场扩展了原来的生暗区模型。在我们的模型中，轻子和Z2奇偶标量的不对称性是通过CP破坏右手中微子衰变而同时产生的。前者通过溅射过程转化为重子不对称性，后者通过SU(2)L标量衰变与DM密度有关，称为“非对称介体”。通过这种方式，我们提供了一个扩展的生焦模型，它预测了重子和暗物质的能量密度在同一量级，并解释了低能中微子的质量和混合角。
The scotogenic model is the Standard Model (SM) with Z 2 symmetry and the addition of Z 2 odd right-handed Majorana neutrinos and SU (2) L doublet scalar fields. We have extended the original scotogenic model by an additional Z 2 odd singlet scalar field that plays a role in dark matter. In our model, the asymmetries of the lepton and Z 2 odd doublet scalar are simultaneously produced through CP-violating right-handed neutrino decays. While the former is converted into baryon asymmetry through the sphaleron process, the latter is relaid to the DM density through the decay of SU (2) L doublet scalar that is named “asymmetric mediator”. In this way, we provide an extended scotogenic model that predicts the energy densities of baryon and dark matter being in the same order of magnitude, and also explains the low-energy neutrino masses and mixing angles.