After the spontaneous symmetry breaking, we have electron and its neutrino, a new charged heavylepton 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。
2
Using a potential model with relativistic correction we evaluated the spectrum, lepton decay widths and radiative transition widths of heavy quarkonium systems.