In addition, we introduce the current status of the light meson spectroscopy and the new hadronic states lying beyond the quark model ( glueballs and hybrids). 此外,我们简要介绍了轻介子谱的研究现状以及新强子态&胶球和混杂态。
The light quark mass m ( g) is renormalized by fixing the ρ meson mass. 用固定ρ介子质量对层子质量m(g)重整化。