论文标题
可观察的Scotogenic Dirac模型的特征
Observable Signatures of Scotogenic Dirac Model
论文作者
论文摘要
在这项工作中，我们对Scotogenic Dirac模型的现象学进行了详细的讨论，该模型可以容纳狄拉克中微子质量和暗物质。我们已经研究了该模型中的LFV流程，这些过程由带电的标量$ ϕ^\ pm $和重型费米子$ n_i $介导。实验界限，特别是衰减给Eγ$和$μ\ to 3e $给定的界限，对Yukawa $y_φ$和Masses $ m_ {n1} $，$ m_ϕ $施加了严格的约束。我们选择重型费米昂$ n_1 $作为暗物质候选者，发现正确的遗物密度基本上是通过通过另一个Yukawa $y_χ$歼灭的。满足LFV和暗物质遗物密度约束后，我们考虑了将暗物质歼灭到瘦素中的间接检测。但是约束相对松散。然后，我们就暗物质直接检测进行详细讨论。尽管两个Yukawa都可以为直接检测过程做出贡献，但随着$ Y__ $相关的$ y_ qu $相关过程的限制很大程度上，对$y_φ$相关的过程受到了更多关注。当前和未来的直接检测实验已用于对Yukawas和asses设置约束。当前的直接检测边界相对较宽，几乎不能排除更多的参数区域。对于将来的直接检测实验，由于较大的暴露，可以提高排除能力。大质量区域中的检测能力并未削弱，因为磁性偶极子操作员$ \ Mathcal {o} _ {\ rm mag。} $的质量增强的存在。最后，我们简要讨论了此模型中的对撞机信号搜索，最有前途的签名是对$ ϕ^+ϕ^ - $产生的$ \ ell^+\ ell^+\ ell^ - +\ \ not {\！\！e} _t $。与LFV和暗物质检测相比，$ M_ {N1} $和$ M_DA的排除限制提供了互补的检测能力。
In this work, we make a detailed discussion on the phenomenology of the scotogenic Dirac model, which could accommodate the Dirac neutrino mass and dark matter. We have studied the LFV processes in this model, which are mediated by the charged scalar $ϕ^\pm$ and heavy fermions $N_i$. The experimental bounds, especially given by decays $μ\to eγ$ and $μ\to 3e$, have put severe constraints on Yukawa $y_Φ$ and masses $m_{N1}$, $m_ϕ$. We select the heavy fermion $N_1$ as dark matter candidate and find the correct relic density is basically by annihilating through another Yukawa $y_χ$. After satisfying LFV and dark matter relic density constraints, we consider the indirect detections of dark matter annihilating into leptons. But the constraints are relatively loose. Then we make a detailed discussion on the dark matter direct detections. Although two Yukawa can both contribute to the direct detection processes, more attention has been paid on the $y_Φ$-related processes as the $y_χ$-related process is bounded loosely. The current and future direct detection experiments have been used to set constraints on the Yukawas and masses. The current direct detections bounds are relatively loose and can barely exclude more parameter region beyond the LFV. For the future direct detection experiments, the excluding capacities can be improved due to larger exposures. The detecting capabilities in the large mass region have not been weakened as the existence of mass enhancement from the magnetic dipole operator $\mathcal{O}_{\rm mag.}$. At last, we briefly discuss the collider signal searching in this model, the most promising signature is pair produced $ϕ^+ϕ^-$ and decay into signal of $\ell^+\ell^-+\not{\!\!E}_T$. The exclusion limits from collider on $m_{N1}$ and $m_ϕ$ have provided a complementary detecting capability compared to the LFV and dark matter detections.
