We assume a dark $U{\left(1\right)}_D$ symmetric hidden sector and explore its possible content such that neutrino mass and Dark Matter are generated through the scotogenic mechanism. The hidden sector is considered analogue to the Standard Model, namely the charge assignment of hidden fermions is chiral and anomaly-free. Moreover, $U{\left(1\right)}_D$ is assumed broken by an only Higgs singlet that also generates masses to all hidden fermions, therefore the charge assignment is subjected to additional restriction. We search by computer program for charge assignments satisfying all these conditions, and identify the resulting minimal scotogenic models for Majorana neutrinos and Dirac neutrinos respectively in the sense of minimal number of messenger scalar involved. Particle spectrum, couplings, and phenomenologies of these minimal models are briefly discussed. DM is found multicomponent and always contains Dirac fermionic species.

我们假设一个黑暗 $ü{（\mathrm{1个}）}_d$对称的隐藏扇区，并探索其可能的内容，以使中微子质量和暗物质通过发烟机制生成。隐藏的扇区被认为是与标准模型类似的，即隐藏的费米子的电荷分配是手征性且无异常的。而且， $ü{（\mathrm{1个}）}_d$假设只有一个希格斯单重态会破坏该单重态，该单重态也会对所有隐藏的费米子产生质量，因此电荷分配受到其他限制。我们通过计算机程序搜索满足所有这些条件的电荷分配，并从涉及的信使标量的最小数量上分别识别出对马约拉纳中微子和狄拉克中微子产生的最小Scotogenic模型。简要讨论了这些最小模型的粒子光谱，耦合和现象。DM被发现是多组分的，并且总是含有狄拉克铁离子物质。