自发 Scotogenic 轻子生成
Spontaneous Scoto-leptogenesis
AI总结：
该研究在动力学最小 scotogenic 模型中提出低能标自发 Scotogenic 轻子生成机制，可同时容纳中微子质量与多成分暗 sector，将最轻 RHN 质量降至 TeV 量级，有望通过多种实验测试。
AI中文摘要：
我们在动力学最小 scotogenic 模型中提出了一种低能标自发轻子生成场景，以同时容纳中微子质量和惰性标量暗物质，因此将该机制命名为自发 Scotogenic 轻子生成。在该设定中，由整体 U(1)_{B-L} 对称性破缺产生的滚动 Majoron，在存在 B-L 破坏相互作用时，会诱导出 B-L 荷的有效化学势，而这些相互作用允许右手中微子（RHN）的有效衰变和逆衰变，从而通过电弱 sphaleron 转换产生观测到的宇宙重子不对称性。该机制在强 washout 区域中有效，成功将最轻 RHN 的可行质量标度降低到 TeV 量级，从而使具有两个分层 RHN 的热 scotogenic 轻子生成可通过直接测试实现。我们确定了 λ₅ 耦合在自发轻子生成和惰性标量暗物质中的作用，该作用通过惰性标量不对称性的有效擦除实现。我们还探索了动力学失准导致的 Majoron 暗物质区域，表明该模型中可实现包含惰性标量和 Majoron 的多成分暗 sector。所得框架为低能标重子生成、中微子质量和多成分暗 sector 提供了统一起源，可通过直接探测实验、惰性标量的对撞机搜索以及未来 Majoron 暗物质或暗辐射的探测，通过互补实验探针进行测试。
英文摘要：
We propose a low-scale spontaneous leptogenesis scenario within the dynamical minimal scotogenic model for accommodating neutrino masses and inert scalar dark matter simultaneously. Thus, we dub the mechanism Spontaneous Scoto-leptogenesis. In this setup, a rolling Majoron arising from the global $U(1)_{B-L}$ symmetry breaking induces an effective chemical potential for the $B-L$ charge in the presence of $B-L$ violating interactions that allow for the efficient decays and inverse decays of right handed neutrinos (RHN), so it gives rise to the observed baryon asymmetry of the Universe through the electroweak sphaleron conversion. The mechanism becomes effective in the strong washout regime and successfully lowers the viable mass scale of the lightest RHN to the range of TeV scales, thereby making the thermal scotogenic leptogenesis with two hierarchical RHNs accessible to direct tests. We identify the roles of the $λ_5$ coupling for spontaneous leptogenesis and inert scalar dark matter through the efficient erasure of the inert scalar asymmetry. We also explore the regime for Majoron dark matter from the kinetic misalignment, showing that a multicomponent dark sector comprising the inert scalar and the Majoron can be realized in the model. The resulting framework provides a unified origin for low-scale baryogenesis, neutrino masses, and multicomponent dark sector, so it can be tested by complementary experimental probes through direct detection experiments, collider searches for inert scalars, and future detection of Majoron dark matter or dark radiation.
