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arXiv 1004.2162hep-phnucl-th
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热核核物质中核子的相对论谱函数

Relativistic spectral function of nucleon in hot nuclear matter

Sabyasachi Ghosh, S. Mallik, Sourav Sarkar

摘要:

本文在相对论框架下,用实时热场论计算了有限温度下核物质中核子的自能。单圈图的虚部被确定为跨酉割和朗道割的不连续性。我们发现,在一般情况下,这两个削减贡献显着的谱函数的区域(虚)核子质量通常被认为是,即使酉削减被忽略在文献中。另外,我们的相对论谱函数不同于在非相对论近似,在一些早期的计算中使用的一个。

英文摘要:

We present a simple calculation of the nucleon self-energy in nuclear matter at finite temperature in a relativistic framework, using the real time thermal field theory. The imaginary parts of one-loop graphs are identified with discontinuities across the unitary and the Landau cuts. We find that in general both the cuts contribute significantly to the spectral function in the region of (virtual) nucleon mass usually considered, even though the unitary cut is ignored in the literature. Also our relativistic spectral function differs from the one in non-relativistic approximation, used in some earlier calculations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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