论文标题
通过乳胶生成发生不对称的自我互动暗物质
Asymmetric Self-interacting Dark Matter via Dirac Leptogenesis
论文作者
论文摘要
迄今为止，中微子的性质，无论是狄拉克还是马拉纳群岛，都是尚不清楚的。假设中微子是狄拉克（Dirac），需要$ b-l $才能确切的对称性，我们试图解释目前宇宙中暗物质密度（DM）和baryonic物质之间观察到的比例性，即$ {\ it I.e。假设在早期宇宙中存在重$ su（2）_l $ scalar doublet $（x =（x^0，x^ - ）^t）$，则可以在左右右手的范围内通过cp-violibrating of-equilibrating of-equilibrium decay decay $ x^0^iS iS iS iS cp^iS ins Expert to us $ b $ b n $ b n $ b n $ cp-b-l $ symmetry。我们确保直到electroweak（ew）相变下的$ν_l-ν_r$平衡才能发生，在此期间，Lepton不对称的一部分通过尺寸八个操作员转化为暗物质不对称，这使$ b-l $ symmetry symetry symmetry symmetry symmetry and symmetry且具有热平衡。然后，其余的$ B-L $不对称性通过EW-SPHALERS转换为净B-空气对称性，该ew-sphaleron处于高于100 GEV的温度下。为了减轻$λ$ CDM的小尺度异常，我们假设DM通过轻介质进行自我相互作用，这不仅会消耗DM的对称组件，而且还可以通过标量式通过Scalar Portal Compal混合来检测地面实验室的DM。
The nature of neutrinos, whether Dirac or Majorana, is hitherto not known. Assuming that the neutrinos are Dirac, which needs $B-L$ to be an exact symmetry, we make an attempt to explain the observed proportionality between the relic densities of dark matter (DM) and baryonic matter in the present Universe ${\it i.e.,}\,\, Ω_{\rm DM} \approx 5\, Ω_{\rm B}$. Assuming the existence of heavy $SU(2)_L$ scalar doublet $(X= (X^0, X^-)^T)$ in the early Universe, an equal and opposite $B-L$ asymmetry can be generated in left and right-handed sectors by the CP-violating out-of-equilibrium decay $X^0 \to ν_L ν_R$ since $B-L$ is an exact symmetry. We ensure that $ν_L-ν_R$ equilibration does not occur until below the electroweak (EW) phase transition during which a part of the lepton asymmetry gets converted to dark matter asymmetry through a dimension eight operator, which conserves $B-L$ symmetry and is in thermal equilibrium. The remaining $B-L$ asymmetry then gets converted to a net B-asymmetry through EW-sphalerons which are active at a temperature above 100 GeV. To alleviate the small-scale anomalies of $Λ$CDM, we assume the DM to be self-interacting via a light mediator, which not only depletes the symmetric component of the DM, but also paves a way to detect the DM at terrestrial laboratories through scalar portal mixing.
