论文标题
在SM的SCOTOGON扩展中，暗物质和Dirac中微子质量产生的新的可行质量区域
A new viable mass region of Dark matter and Dirac neutrino mass generation in a scotogenic extension of SM
论文作者
论文摘要
我们提出了标准模型的Scotogenic扩展，该扩展可以在新的，理论上未解决的，中间区域（$ 200 \ leq m_ {dm} \ leq 550 $ GEV）中提供标量暗物质候选者，也可以产生轻质的迪拉克中午群众。在此框架中，标准模型由三个量规单程费米子，两个单元标量字段和一个附加标量双打扩展，所有这些模型在$ z_ {2} \ times z_ {4} $离散对称性下都是奇怪的。这些额外的对称性阻止了Singlet Fermions获得Majorana质量术语，并为暗物质候选者提供稳定性。众所周知，在标量Singlet DM模型的情况下，唯一尚未排除的区域是一个狭窄的区域，靠近Higgs共振$ M_ {s} \ simeq \ frac {M_ {h}}} {2} {2} $ - 其他从不同的实验和理论性的界限中排除的。在惰性双重模型的情况下，允许质量区域（$ \ sim 60 $ - $ 80 $ GEV）和高质量区域（大于$ 550 $ GEV）。这激发了我们探索中间质量区域中的参数范围$ m_ {w} \ leq m_ {dm} \ leq 550 $ GEV，我们在用标量doublet和scalut swiments的scotogenic extensig extensig extensic中使用。我们模型中的暗物质是单线和双线标量的混合物。我们使用在当前的暗物质遗物丰度，中微子质量和最新绑定的Xenon1t实验中的旋转独立的DM核子散射横截面上限制了模型的允许参数空间。如果在未来的实验中发现了这个新的DM候选群众窗口，那么我们的模型可能会在新的，未开发的质量范围内提供可行的DM候选者（200美元\ leq m_ {dm} \ leq 550 $ GEV），因为在未来的实验中会发现中性群岛的中性群岛的质量质量，因为远处的毛刺群众对大型群众的支持没有强有力的证据。
We propose a scotogenic extension of the Standard Model which can provide a scalar Dark Matter candidate in the new, theoretically previously unaddressed, intermediate region ($200\leq M_{DM}\leq 550$ GeV) and also generate light Dirac neutrino masses. In this framework, the standard model is extended by three gauge singlet fermions, two singlet scalar fields, and one additional scalar doublet, all of which are odd under $Z_{2} \times Z_{4}$ discrete symmetry. These additional symmetries prevent the singlet fermions from obtaining Majorana mass terms along with providing the stability to the dark matter candidate. It is known that in the case of the scalar singlet DM model, the only region which is not yet excluded is a narrow region close to the Higgs resonance $m_{S} \simeq\frac{m_{h}}{2}$ - others ruled out from different experimental and theoretical bounds. In the case of the Inert doublet model, the mass region ($\sim 60$-$80$ GeV) and the high mass region (heavier than $ 550 $ GeV) are allowed. This motivates us to explore a parameter range in the intermediate-mass region $M_{W}\leq M_{DM}\leq 550 $ GeV, which we do in a scotogenic extension of SM with a scalar doublet and scalar singlets. The dark matter in our model is a mixture of singlet and doublet scalars. We constrain the allowed parameter space of the model using Planck bound on present dark matter relic abundance, neutrino mass, and the latest bound on spin-independent DM-nucleon scattering cross-section from XENON1T experiment. Our model may provide a viable DM candidate in the new, previously unexplored mass range ($200\leq M_{DM}\leq 550$ GeV), if this new window for the DM candidate mass is detected in future experiments, along with explanation of Dirac mass of neutrinos, since so far there is no strong evidence in support of Majorana nature of neutrino mass.
