Type-III seesaw is a simple extension of the Standard Model (SM) with the SU${(2)}_{\text{L}}$ triplet fermion with zero hypercharge. It can explain the origin of the tiny neutrino mass and flavor mixing. After the electroweak symmetry breaking the light neutrino mass is generated by the seesaw mechanism which further ensures the mixings between the light neutrino and heavy neutral lepton mass eigenstates. If the triplet fermions are around the electroweak scale having sizable mixings with the SM sector allowed by the correct gauge symmetry, they can be produced at the high energy colliders leaving a variety of characteristic signatures. Based on a simple and concrete realizations of the model we employ a general parametrization for the neutrino Dirac mass matrix and perform a parameter scan to identify the allowed regions satisfying the experimental constraints from the neutrino oscillation data, the electroweak precision measurements and the lepton-flavor violating processes, respectively considering the normal and inverted neutrino mass hierarchies. These parameter regions can be probed at the different collider experiments.

III型跷跷板是SU的标准模型（SM）的简单扩展${（\mathrm{2个}）}_{\text{大号}}$三重费米子（零电荷）。它可以解释微小的中微子质量和风味混合的起源。电弱对称破坏后，跷跷板机构产生轻中微子质量，该跷跷板机构进一步确保了轻中微子和重中性轻子质量本征态之间的混合。如果三重态费米子在电弱标度附近，并且通过正确的量规对称性允许与SM区段进行相当大的混合，则它们可以在高能对撞机上产生，并留下各种特征性特征。基于该模型的简单而具体的实现，我们对中微子Dirac质量矩阵进行了通用参数化，并执行了参数扫描，以从中微子振荡数据中识别出满足实验约束的允许区域，电弱精度测量和轻子风味违反过程，分别考虑了正常和反向中微子质量层次结构。可以在不同的对撞机实验中探查这些参数区域。