Tachyon Pole in σ Meson Propagator in Nuclear Matter in the Relativistic σ—ω Model |
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引用本文: | CHENWei AIBao-Quan 等.Tachyon Pole in σ Meson Propagator in Nuclear Matter in the Relativistic σ—ω Model[J].理论物理通讯,2001,36(2):183-186. |
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作者姓名: | CHENWei AIBao-Quan |
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作者单位: | [1]DepartmentofPhysics,ZhongshanUniversity,Guangzhou510275,China [2]DepartmentofPhysics,ZhongshanUniversity |
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摘 要: | The conditions that the tachyon pole of the σ meson propagator in nuclear matter appears are studied in the one-loop approximation in the relativistic σ-ω model.Different from the results of the previous paper,we find that the effect of the constant a in the self-interaction,U(σ)=aσ 1/2! bσ^2 1/3!cσ^3 1/4!dσ^4,of the σ meson cannot be neglected.It determines the critical density where techyon appears.The smaller the a,the larger the critical density.The binding energy,pressure,incompressibility coefficient,nucleon effective mass are calculated and the relation between parameters to the tachyon pole is also studied.
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关 键 词: | 高能物理 σ介子传播子 核物质 相对论σ-ω模型 |
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