Abstract
为了找到一种获得K-π相移的有效方法,并从格点计算得到的能级中获取K^＊介子的性质,首先使用手征幺正理论研究了有限体积中的P波K-π相互作用.这种方法曾在无限空间中成功地应用于计算K-π相移.然后用这种方法计算得到作为立方体盒子尺寸和π介子质量的函数的P波K-π散射振幅的能级;并计算了K-π散射的相移以及基于该结果的K^＊介子的物理性质.最后,为了和格点量子色动力学（QCD）计算结果进行比较,又在π介子取非物理质量时计算得到了K^＊介子的能级.比较表明：文中方法与格点QCD得到的结果基本一致.当介子能量为266 Me V时,本文方法得到的两个能级分别为924.0 Me V和1 483.0 Me V,其结果与格点QCD得到的915.6 Me V和1 522.3 Me V的两个能级符合得很好.
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