【摘 要】
：
文中研究了手征σ模型下σ介子的质量mσ与核物质结合能曲线的关系,主要的目的是研究在单圈图近似下所谓的"快子极点"问题,即σ或π介子质量的平方变为负数,这将导致能量密度
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文中研究了手征σ模型下σ介子的质量mσ与核物质结合能曲线的关系,主要的目的是研究在单圈图近似下所谓的"快子极点"问题,即σ或π介子质量的平方变为负数,这将导致能量密度为虚数.把mσ看成自由参数并通过拟合核物质的饱和性质而确定,结果表明,在单圈图真空起伏近似下,并选重整化点在质量壳上,当mσ=307.5MeV而且核密度小于4.43倍正常饱和密度时,"快子极点"没有出现,因此首先得到了核物质结合能曲线以及计算了不可压缩系数K((＝)175.7MeV).
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