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arXiv 0901.0842hep-phnucl-th
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轴矢量介子在手征相变附近的作用

Role of axial-vector mesons near the chiral phase transition

C. Sasaki, M. Harada, W. Weise

摘要:

本文在有效场论中系统地研究了电流关联函数中的矢量-轴向矢量混合(V-A混合)及其随温度的演化。在临界温度$T_c$下,$a_1$-$ρ$ - $π$耦合消失,因此V-A混合也消失。一个值得注意的观察是,即使对于有限的$m_π$,$ρ$和$a_1$介子质量在$T_c$几乎是简并的。在$T_c$处消失的V-A混合保持大致完整。

英文摘要:

We present a systematic study of the vector--axial-vector mixing (V-A mixing) in the current correlation functions and its evolution with temperature within an effective field theory. The $a_1$-$ρ$-$π$ coupling vanishes at the critical temperature $T_c$ and thus the V-A mixing also vanishes. A remarkable observation is that even for finite $m_π$ the $ρ$ and $a_1$ meson masses are almost degenerate at $T_c$. The vanishing V-A mixing at $T_c$ stays approximately intact.

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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