Mass is really a coupling between a left handed fermion and a right handed fermion.
Mass is really a coupling between a left handed fermion and a right handed fermion.
电子与电子中微子，以及在第二、三代中相对应的粒子，被统称为轻子。
Mass is really a coupling between a left handed fermion and a right handed fermion.
电子与电子中微子，以及在第二、三代中相对应的粒子，被统称为轻子。