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采用Kustannheimo-Stiefel变换(简称K-S变换),将四维协变谐振子的介子结构模型化为三维氢原子问题。在求解中能较自然地避开时间自由度激发的困难,求得介子质量谱的平方规律。By use of the Kustannheimo-Stiefel transformation, the problem of a four-dimensional covariant harmonic oscillator can be transformed to that of a three-dimensional hydrogen atom with constraint. On this basis, the difficulty of the excitation of the time degree of freedom can be avoided naturally and the mass-squared formula for mesons can be obtained.
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