We propose a type of hybrid Seesaw model that combines Type-1 and Type-2 Seesaw mechanism in multiplicative way to generate tree level Majorana neutrino mass and provides a Dark Matter candidate. The model extends the Standard Model by extra gauge symmetry $U{(1)}_D$ and hidden sector consisted of chiral fermions and additional scalar fields. After spontaneous symmetry breaking, light neutrino masses are generated not only by exchange of the new heavy fermions as Type-1 Seesaw, but also by coupling to the naturally small induced vacuum expectation value of new heavy scalar as Type-2 Seesaw. An unbroken residue of $U{(1)}_D$ protects the lightest Dirac fermion required by anomaly cancellation in hidden sector from decaying, therefore giving rise to a Dark Matter candidate. Due to strong enough Seesaw suppression from our hybridization, new physics scale can be as low as TeV in this model and discovering signal from LHC data is possible in near future.

我们提出了一种混合跷跷板模型，它以乘法的方式结合了 Type-1 和 Type-2 跷跷板机制，以生成树级马约拉纳中微子质量并提供暗物质候选者。该模型通过额外的规范对称扩展了标准模型$ü{(1)}_D$隐藏扇区由手性费米子和额外的标量场组成。在自发对称破缺后，轻中微子质量不仅通过新的重费米子交换产生，如 1 型跷跷板，还通过耦合到新重标量的自然小诱导真空期望值，如 2 型跷跷板。一个完整的残留物$ü{(1)}_D$保护隐藏扇区中异常消除所需的最轻的狄拉克费米子免于衰减，因此产生了暗物质候选者。由于我们的杂交产生了足够强的跷跷板抑制，在这个模型中新的物理尺度可以低至 TeV，并且在不久的将来从 LHC 数据中发现信号是可能的。