论文标题
低尺度Seesaw的瘦肉和暗物质
Leptogenesis and Dark Matter from Low Scale Seesaw
论文作者
论文摘要
在本文中，我们对瘦物质发生和暗物质形成低尺度Seesaw进行了细节分析。在$ν$ 2hdm的框架中，我们进一步推出了一个标量单元$ ϕ $和一个dirac fermion singlet $χ$，这些单元$χ$，这些$χ$在$ z_2 $的对称性下收取。假设$χ$的耦合非常小，则用作fli脚的暗物质。沉重的右手中微子$ n $为微小中微子质量（通过Seesaw机构），瘦化生成提供了共同的起源（通过$ n \ to \ ell_lφ_ν^*，\ bar {\ ell} _l} _lφ_ν$）和暗物质（通过$ n \ to χϕ $）。借助层次右手中微子质量，显式计算表明，即使对于TEV量表$ n_1 $，成功的热卵生生成是可行的，$ n_1 $，$ 0.4 \ sillssimv_ν\ sillesim1 $ gev和最轻的中心质量$ m_1 \ m_1 \ sillesim 10^{ - 11}} $ ev。在这种情况下，自然而然地期待着MEV范围的kev到MEV范围的轻蝇暗物质。本文还获得了中微子质量，天然瘦素发生和FISP DM的常见参数空间。
In this paper, we perform a detail analysis on leptogenesis and dark matter form low scale seesaw. In the framework of $ν$2HDM, we further introduce one scalar singlet $ϕ$ and one Dirac fermion singlet $χ$, which are charged under a $Z_2$ symmetry. Assuming the coupling of $χ$ is extremely small, it serves as a FIMP dark matter. The heavy right hand neutrinos $N$ provide a common origin for tiny neutrino mass (via seesaw mechanism), leptogenesis (via $N\to \ell_L Φ_ν^*,\bar{\ell}_L Φ_ν$) and dark matter (via $N\to χϕ$). With hierarchical right hand neutrino masses, the explicit calculation shows that success thermal leptogenesis is viable even for TeV scale $N_1$ with $0.4 \lesssim v_ν\lesssim1$ GeV and lightest neutrino mass $m_1\lesssim 10^{-11}$ eV. In such scenario, light FIMP dark matter in the keV to MeV range is naturally expected. The common parameter space for neutrino mass, natural leptogenesis and FIMP DM is also obtained in this paper.
