Role of axial-vector mesons near the chiral phase transition

详细信息    查看全文

• 作者：Chihiro Sasaki ; Masayasu Harada ; Wolfram Weise
• 关键词：Vector– ; axial-vector mixing in hot matter ; Chiral symmetry restoration
• 刊名：Nuclear Physics A
• 出版年：2009
• 出版时间：15 August 2009
• 年：2009
• 卷：827
• 期：1-4
• 页码：350c-352c
• 全文大小：191 K

文摘

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 a₁-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 a₁ meson masses are almost degenerate at T_c. The vanishing V-A mixing at T_c stays approximately intact.