对规范粒子的极化矢量做了较为系统的论述.讨论内容包括极化矢量的具体形式和性质、求和规则和规范传播子之间的关系以及由其张成的投影算子的性质.通过若干精选的例子,进一步演示了计算牵涉规范粒子的过程时采用的基本方法和应当注意事项.
We investigate the properties of polarization vectors for gauge bosons, including their forms with arbitrary polarization direction in laboratory frame, their different sum rules, and the projection operators they constitute. Then by some examples, we illustrate techniques in calculating processes involving gauge bosons. Our discussion is beneficial for the understanding of the essence of gauge bosons.