After the spontaneous symmetry breaking, we have electron and its neutrino, a new charged heavy lepton and its neutrino, two neutral heavy leptons.

自发破缺的结果除电子和电子中微子外，还出现新的中微子以及一个带电的和两个中性重轻子。

youdao

An elementary particle in the lepton family (not a meson), having a mass209 times that of the electron, a negative electric charge, and a mean lifetime of2.2? 0-6 second.

介子轻子族中的一种基本微粒(非介子)，其质量为电子的209倍，是一种负电荷，平均寿命为2。

youdao

WIMPS. The more massive members of each lepton pair are the electrically charged electron (the outer constituent of atoms) and two other particles that resemble electrons in all measurable ways except that they are heavier, and are unstable in today's modern universe.

ECONOMIST: Particle physics makes sense, but it assumes too much